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615b36969081cd9993e982c9b0b929aa84555b10
vd_960/vd960Loop/libraries/drivers/src/at32f421_i2c.c
wangfq 95808f9f25 refactor(vd960Loop): 算法回退到 DLD154V4B，四通道适配 
- 用 DLD154V4B vd1_task/per_channel 替换 vds_task 复杂算法
- 移除 FUNCTION_B/二次判断/快速变化/多重确认等增强特性
- 保留平坦性离开算法 (CN200910309382)，每通道独立状态
- 灵敏度表改为 DLD154V4B 4级: {216,108,36,10} / {108,72,18,9}
- 清理废弃类型: FltHistoryManager, Loop_ACS_Info, StageRangeConfig 等
- 首次添加 vd960DBN 完整源码
2026-06-25 16:21:57 +08:00

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/**
**************************************************************************
* @file at32f421_i2c.c
* @brief contains all the functions for the i2c firmware library
**************************************************************************
* Copyright notice & Disclaimer
*
* The software Board Support Package (BSP) that is made available to
* download from Artery official website is the copyrighted work of Artery.
* Artery authorizes customers to use, copy, and distribute the BSP
* software and its related documentation for the purpose of design and
* development in conjunction with Artery microcontrollers. Use of the
* software is governed by this copyright notice and the following disclaimer.
*
* THIS SOFTWARE IS PROVIDED ON "AS IS" BASIS WITHOUT WARRANTIES,
* GUARANTEES OR REPRESENTATIONS OF ANY KIND. ARTERY EXPRESSLY DISCLAIMS,
* TO THE FULLEST EXTENT PERMITTED BY LAW, ALL EXPRESS, IMPLIED OR
* STATUTORY OR OTHER WARRANTIES, GUARANTEES OR REPRESENTATIONS,
* INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
*
**************************************************************************
*/
#include "at32f421_conf.h"
/** @addtogroup AT32F421_periph_driver
* @{
*/
/** @defgroup I2C
* @brief I2C driver modules
* @{
*/
#ifdef I2C_MODULE_ENABLED
/** @defgroup I2C_private_functions
* @{
*/
/**
* @brief reset the i2c register
* @param i2c_x: to select the i2c peripheral.
* this parameter can be one of the following values:
* I2C1, I2C2.
* @retval none
*/
void i2c_reset(i2c_type *i2c_x)
{
if(i2c_x == I2C1)
{
crm_periph_reset(CRM_I2C1_PERIPH_RESET, TRUE);
crm_periph_reset(CRM_I2C1_PERIPH_RESET, FALSE);
}
else if(i2c_x == I2C2)
{
crm_periph_reset(CRM_I2C2_PERIPH_RESET, TRUE);
crm_periph_reset(CRM_I2C2_PERIPH_RESET, FALSE);
}
}
/**
* @brief software reset.
* @param i2c_x: to select the i2c peripheral.
* this parameter can be one of the following values:
* I2C1, I2C2.
* @param new_state (TRUE or FALSE)
* @retval none
*/
void i2c_software_reset(i2c_type *i2c_x, confirm_state new_state)
{
i2c_x->ctrl1_bit.reset = new_state;
}
/**
* @brief init i2c speed and duty cycle.
* @param i2c_x: to select the i2c peripheral.
* this parameter can be one of the following values:
* I2C1, I2C2.
* @param duty
* this parameter can be one of the following values:
* - I2C_FSMODE_DUTY_2_1: duty cycle 2:1
* - I2C_FSMODE_DUTY_16_9: duty cycle 16:9
* @param speed: i2c scl clock speed, such as 100000
* @retval none
*/
void i2c_init(i2c_type *i2c_x, i2c_fsmode_duty_cycle_type duty, uint32_t speed)
{
uint32_t apb_freq = 0;
uint16_t freq_mhz = 0, temp = 0;
crm_clocks_freq_type clocks;
/* disable i2c peripherals */
i2c_x->ctrl1_bit.i2cen = FALSE;
/* get system clock */
crm_clocks_freq_get(&clocks);
if((i2c_x == I2C1) || (i2c_x == I2C2))
{
apb_freq = clocks.apb1_freq;
}
freq_mhz = (apb_freq / 1000000);
/* set i2c input clock frequency */
i2c_x->ctrl2_bit.clkfreq = freq_mhz;
/* standard mode */
if(speed <= 100000)
{
temp = (uint16_t)(apb_freq / (speed << 1));
if (temp < 0x04)
{
temp = 0x04;
}
/* set scl clock */
i2c_x->clkctrl_bit.speed = temp;
/* disable fast mode */
i2c_x->clkctrl_bit.speedmode = FALSE;
/* set the maximum rise time */
if((freq_mhz + 1) > 0x3F)
{
i2c_x->tmrise_bit.risetime = 0x3F;
}
else
{
i2c_x->tmrise_bit.risetime = (freq_mhz + 1);
}
}
/* fast mode */
else
{
if (duty == I2C_FSMODE_DUTY_2_1)
{
temp = (uint16_t)(apb_freq / (speed * 3));
/* the ratio of high level to low level is 1:2 */
i2c_x->clkctrl_bit.dutymode = I2C_FSMODE_DUTY_2_1;
}
else
{
temp = (uint16_t)(apb_freq / (speed * 25));
/* the ratio of high level to low level is 9:16 */
i2c_x->clkctrl_bit.dutymode = I2C_FSMODE_DUTY_16_9;
}
if (temp == 0)
{
temp = 0x0001;
}
/* set scl clock*/
i2c_x->clkctrl_bit.speed = temp;
/* set the mode to fast mode */
i2c_x->clkctrl_bit.speedmode = TRUE;
/* set the maximum rise time */
if(speed <= 400000)
{
i2c_x->tmrise_bit.risetime = (uint16_t)(((freq_mhz * (uint16_t)300) / (uint16_t)1000) + (uint16_t)1);
}
else
{
i2c_x->tmrise_bit.risetime = (uint16_t)(((freq_mhz * (uint16_t)120) / (uint16_t)1000) + (uint16_t)1);
}
}
}
/**
* @brief config own address1.
* @param i2c_x: to select the i2c peripheral.
* this parameter can be one of the following values:
* I2C1, I2C2.
* @param mode
* this parameter can be one of the following values:
* - I2C_ADDRESS_MODE_7BIT: 7bit address.
* - I2C_ADDRESS_MODE_10BIT: 10bit address.
* @param address: own address1, such as 0xb0.
* @retval none
*/
void i2c_own_address1_set(i2c_type *i2c_x, i2c_address_mode_type mode, uint16_t address)
{
/* set address mode */
i2c_x->oaddr1_bit.addr1mode = mode;
/* set own address1 */
i2c_x->oaddr1_bit.addr1 = address;
}
/**
* @brief config own address2.
* @param i2c_x: to select the i2c peripheral.
* this parameter can be one of the following values:
* I2C1, I2C2.
* @param address: specifies the 7bit i2c own address2, such as 0xa0.
* @retval none.
*/
void i2c_own_address2_set(i2c_type *i2c_x, uint8_t address)
{
i2c_x->oaddr2_bit.addr2 = (address >> 1);
}
/**
* @brief enable or disable own address2.
* @param i2c_x: to select the i2c peripheral.
* this parameter can be one of the following values:
* I2C1, I2C2.
* @param new_state (TRUE or FALSE)
* @retval none
*/
void i2c_own_address2_enable(i2c_type *i2c_x, confirm_state new_state)
{
i2c_x->oaddr2_bit.addr2en = new_state;
}
/**
* @brief enable or disable the smbus mode
* @param i2c_x: to select the i2c peripheral.
* this parameter can be one of the following values:
* I2C1, I2C2.
* @param new_state (TRUE or FALSE)
* @retval none
*/
void i2c_smbus_enable(i2c_type *i2c_x, confirm_state new_state)
{
i2c_x->ctrl1_bit.permode = new_state;
}
/**
* @brief enable or disable i2c periph
* @param i2c_x: to select the i2c peripheral.
* this parameter can be one of the following values:
* I2C1, I2C2.
* @param new_state (TRUE or FALSE)
* @retval none
*/
void i2c_enable(i2c_type *i2c_x, confirm_state new_state)
{
i2c_x->ctrl1_bit.i2cen = new_state;
}
/**
* @brief config fast mode duty cycle
* @param i2c_x: to select the i2c peripheral.
* this parameter can be one of the following values:
* I2C1, I2C2.
* @param duty
* this parameter can be one of the following values:
* - I2C_FSMODE_DUTY_2_1: duty cycle 2:1
* - I2C_FSMODE_DUTY_16_9: duty cycle 16:9
* @retval none
*/
void i2c_fast_mode_duty_set(i2c_type *i2c_x, i2c_fsmode_duty_cycle_type duty)
{
i2c_x->clkctrl_bit.dutymode = duty;
}
/**
* @brief enable or disable clock stretch.
* @param i2c_x: to select the i2c peripheral.
* this parameter can be one of the following values:
* I2C1, I2C2.
* @param new_state (TRUE or FALSE)
* @retval none
*/
void i2c_clock_stretch_enable(i2c_type *i2c_x, confirm_state new_state)
{
i2c_x->ctrl1_bit.stretch = !new_state;
}
/**
* @brief enable or disable acknowledge.
* @param i2c_x: to select the i2c peripheral.
* this parameter can be one of the following values:
* I2C1, I2C2.
* @param new_state (TRUE or FALSE)
* @retval none.
*/
void i2c_ack_enable(i2c_type *i2c_x, confirm_state new_state)
{
i2c_x->ctrl1_bit.acken = new_state;
}
/**
* @brief master receiving mode acknowledge control.
* @param i2c_x: to select the i2c peripheral.
* this parameter can be one of the following values:
* I2C1, I2C2.
* @param pos
* this parameter can be one of the following values:
* - I2C_MASTER_ACK_CURRENT: acken bit acts on the current byte
* - I2C_MASTER_ACK_NEXT: acken bit acts on the next byte
* @retval none
*/
void i2c_master_receive_ack_set(i2c_type *i2c_x, i2c_master_ack_type pos)
{
i2c_x->ctrl1_bit.mackctrl = pos;
}
/**
* @brief pec position set.
* @param i2c_x: to select the i2c peripheral.
* this parameter can be one of the following values:
* I2C1, I2C2.
* @param pos
* this parameter can be one of the following values:
* - I2C_PEC_POSITION_CURRENT: the current byte is pec
* - I2C_PEC_POSITION_NEXT: the next byte is pec
* @retval none
*/
void i2c_pec_position_set(i2c_type *i2c_x, i2c_pec_position_type pos)
{
i2c_x->ctrl1_bit.mackctrl = pos;
}
/**
* @brief enable or disable general call.
* @param i2c_x: to select the i2c peripheral.
* this parameter can be one of the following values:
* I2C1, I2C2.
* @param new_state (TRUE or FALSE)
* @retval none
*/
void i2c_general_call_enable(i2c_type *i2c_x, confirm_state new_state)
{
i2c_x->ctrl1_bit.gcaen = new_state;
}
/**
* @brief enable or disable arp mode.
* @param i2c_x: to select the i2c peripheral.
* this parameter can be one of the following values:
* I2C1, I2C2.
* @param new_state (TRUE or FALSE)
* @retval none
*/
void i2c_arp_mode_enable(i2c_type *i2c_x, confirm_state new_state)
{
i2c_x->ctrl1_bit.arpen = new_state;
}
/**
* @brief config smbus host or device.
* @param i2c_x: to select the i2c peripheral.
* this parameter can be one of the following values:
* I2C1, I2C2.
* @param level
* this parameter can be one of the following values:
* - I2C_SMBUS_MODE_DEVICE: smbus device.
* - I2C_SMBUS_MODE_HOST: smbus host.
* @retval none
*/
void i2c_smbus_mode_set(i2c_type *i2c_x, i2c_smbus_mode_set_type mode)
{
i2c_x->ctrl1_bit.smbmode = mode;
}
/**
* @brief drive the smbus alert pin high or low.
* @param i2c_x: to select the i2c peripheral.
* this parameter can be one of the following values:
* I2C1, I2C2.
* @param level
* this parameter can be one of the following values:
* - I2C_SMBUS_ALERT_LOW: smbus alert pin set low.
* - I2C_SMBUS_ALERT_HIGH: smbus alert pin set high.
* @retval none
*/
void i2c_smbus_alert_set(i2c_type *i2c_x, i2c_smbus_alert_set_type level)
{
i2c_x->ctrl1_bit.smbalert = level;
}
/**
* @brief enable or disable pec transfer.
* @param i2c_x: to select the i2c peripheral.
* this parameter can be one of the following values:
* I2C1, I2C2.
* @param new_state (TRUE or FALSE)
* @retval none
*/
void i2c_pec_transmit_enable(i2c_type *i2c_x, confirm_state new_state)
{
i2c_x->ctrl1_bit.pecten = new_state;
}
/**
* @brief enable or disable pec calcultetion.
* @param i2c_x: to select the i2c peripheral.
* this parameter can be one of the following values:
* I2C1, I2C2.
* @param new_state (TRUE or FALSE)
* @retval none
*/
void i2c_pec_calculate_enable(i2c_type *i2c_x, confirm_state new_state)
{
i2c_x->ctrl1_bit.pecen = new_state;
}
/**
* @brief get pec value.
* @param i2c_x: to select the i2c peripheral.
* this parameter can be one of the following values:
* I2C1, I2C2.
* @retval uint8_t: pec value.
*/
uint8_t i2c_pec_value_get(i2c_type *i2c_x)
{
return i2c_x->sts2_bit.pecval;
}
/**
* @brief enable or disable if the next dma transfer will be the last one.
* @param i2c_x: to select the i2c peripheral.
* this parameter can be one of the following values:
* I2C1, I2C2.
* @param new_state (TRUE or FALSE)
* @retval none
*/
void i2c_dma_end_transfer_set(i2c_type *i2c_x, confirm_state new_state)
{
i2c_x->ctrl2_bit.dmaend = new_state;
}
/**
* @brief enable or disable dma requests.
* @param i2c_x: to select the i2c peripheral.
* this parameter can be one of the following values:
* I2C1, I2C2.
* @param new_state (TRUE or FALSE)
* @retval none
*/
void i2c_dma_enable(i2c_type *i2c_x, confirm_state new_state)
{
i2c_x->ctrl2_bit.dmaen = new_state;
}
/**
* @brief enable or disable interrupt
* @param i2c_x: to select the i2c peripheral.
* this parameter can be one of the following values:
* I2C1, I2C2.
* @param source
* this parameter can be one of the following values:
* - I2C_DATA_INT: data interrupt.
* - I2C_EV_INT: event interrupt.
* - I2C_ERR_INT: error interrupt.
* @param new_state (TRUE or FALSE)
* @retval none
*/
void i2c_interrupt_enable(i2c_type *i2c_x, uint16_t source, confirm_state new_state)
{
if (new_state != FALSE)
{
i2c_x->ctrl2 |= source;
}
else
{
i2c_x->ctrl2 &= (uint16_t)~source;
}
}
/**
* @brief generate start condition.
* @param i2c_x: to select the i2c peripheral.
* this parameter can be one of the following values:
* I2C1, I2C2.
* @retval none.
*/
void i2c_start_generate(i2c_type *i2c_x)
{
i2c_x->ctrl1_bit.genstart = TRUE;
}
/**
* @brief generate stop condition.
* @param i2c_x: to select the i2c peripheral.
* this parameter can be one of the following values:
* I2C1, I2C2.
* @retval none.
*/
void i2c_stop_generate(i2c_type *i2c_x)
{
i2c_x->ctrl1_bit.genstop = TRUE;
}
/**
* @brief transmit the slave address.
* @param i2c_x: to select the i2c peripheral.
* this parameter can be one of the following values:
* I2C1, I2C2.
* @param address: specifies the slave address which will be transmitted
* @param direction
* this parameter can be one of the following values:
* - I2C_DIRECTION_TRANSMIT: transmit mode.
* - I2C_DIRECTION_RECEIVE: receive mode.
* @retval none.
*/
void i2c_7bit_address_send(i2c_type *i2c_x, uint8_t address, i2c_direction_type direction)
{
if(direction == I2C_DIRECTION_TRANSMIT)
{
i2c_x->dt = address & 0xFE;
}
else
{
i2c_x->dt = address | 0x01;
}
}
/**
* @brief send a byte through the i2c periph.
* @param i2c_x: to select the i2c peripheral.
* this parameter can be one of the following values:
* I2C1, I2C2.
* @param data: byte to be transmitted.
* @retval none
*/
void i2c_data_send(i2c_type *i2c_x, uint8_t data)
{
i2c_x->dt = data;
}
/**
* @brief receive a byte through the i2c periph.
* @param i2c_x: to select the i2c peripheral.
* this parameter can be one of the following values:
* I2C1, I2C2.
* @retval uint8_t: received byte
*/
uint8_t i2c_data_receive(i2c_type *i2c_x)
{
return (uint8_t)i2c_x->dt;
}
/**
* @brief get flag status
* @param i2c_x: to select the i2c peripheral.
* this parameter can be one of the following values:
* I2C1, I2C2.
* @param flag
* this parameter can be one of the following values:
* - I2C_STARTF_FLAG: start condition generation complete flag.
* - I2C_ADDR7F_FLAG: 0~7 bit address match flag.
* - I2C_TDC_FLAG: transmit data complete flag.
* - I2C_ADDRHF_FLAG: master 9~8 bit address header match flag.
* - I2C_STOPF_FLAG: stop condition generation complete flag.
* - I2C_RDBF_FLAG: receive data buffer full flag.
* - I2C_TDBE_FLAG: transmit data buffer empty flag.
* - I2C_BUSERR_FLAG: bus error flag.
* - I2C_ARLOST_FLAG: arbitration lost flag.
* - I2C_ACKFAIL_FLAG: acknowledge failure flag.
* - I2C_OUF_FLAG: overflow or underflow flag.
* - I2C_PECERR_FLAG: pec receive error flag.
* - I2C_TMOUT_FLAG: smbus timeout flag.
* - I2C_ALERTF_FLAG: smbus alert flag.
* - I2C_TRMODE_FLAG: transmission mode.
* - I2C_BUSYF_FLAG: bus busy flag transmission mode.
* - I2C_DIRF_FLAG: transmission direction flag.
* - I2C_GCADDRF_FLAG: general call address received flag.
* - I2C_DEVADDRF_FLAG: smbus device address received flag.
* - I2C_HOSTADDRF_FLAG: smbus host address received flag.
* - I2C_ADDR2_FLAG: own address 2 received flag.
* @retval flag_status (SET or RESET)
*/
flag_status i2c_flag_get(i2c_type *i2c_x, uint32_t flag)
{
__IO uint32_t reg = 0, value = 0;
reg = flag >> 28;
flag &= (uint32_t)0x00FFFFFF;
if(reg == 0)
{
value = i2c_x->sts1;
}
else
{
flag = (uint32_t)(flag >> 16);
value = i2c_x->sts2;
}
if((value & flag) != (uint32_t)RESET)
{
return SET;
}
else
{
return RESET;
}
}
/**
* @brief get interrupt flag status
* @param i2c_x: to select the i2c peripheral.
* this parameter can be one of the following values:
* I2C1, I2C2.
* @param flag
* this parameter can be one of the following values:
* - I2C_STARTF_FLAG: start condition generation complete flag.
* - I2C_ADDR7F_FLAG: 0~7 bit address match flag.
* - I2C_TDC_FLAG: transmit data complete flag.
* - I2C_ADDRHF_FLAG: master 9~8 bit address header match flag.
* - I2C_STOPF_FLAG: stop condition generation complete flag.
* - I2C_RDBF_FLAG: receive data buffer full flag.
* - I2C_TDBE_FLAG: transmit data buffer empty flag.
* - I2C_BUSERR_FLAG: bus error flag.
* - I2C_ARLOST_FLAG: arbitration lost flag.
* - I2C_ACKFAIL_FLAG: acknowledge failure flag.
* - I2C_OUF_FLAG: overflow or underflow flag.
* - I2C_PECERR_FLAG: pec receive error flag.
* - I2C_TMOUT_FLAG: smbus timeout flag.
* - I2C_ALERTF_FLAG: smbus alert flag.
* @retval flag_status (SET or RESET)
*/
flag_status i2c_interrupt_flag_get(i2c_type *i2c_x, uint32_t flag)
{
__IO uint32_t reg = 0, value = 0, iten = 0;
switch(flag)
{
case I2C_STARTF_FLAG:
case I2C_ADDR7F_FLAG:
case I2C_TDC_FLAG:
case I2C_ADDRHF_FLAG:
case I2C_STOPF_FLAG:
iten = i2c_x->ctrl2_bit.evtien;
break;
case I2C_RDBF_FLAG:
case I2C_TDBE_FLAG:
iten = i2c_x->ctrl2_bit.dataien && i2c_x->ctrl2_bit.evtien;
break;
case I2C_BUSERR_FLAG:
case I2C_ARLOST_FLAG:
case I2C_ACKFAIL_FLAG:
case I2C_OUF_FLAG:
case I2C_PECERR_FLAG:
case I2C_TMOUT_FLAG:
case I2C_ALERTF_FLAG:
iten = i2c_x->ctrl2_bit.errien;
break;
default:
break;
}
reg = flag >> 28;
flag &= (uint32_t)0x00FFFFFF;
if(reg == 0)
{
value = i2c_x->sts1;
}
else
{
flag = (uint32_t)(flag >> 16);
value = i2c_x->sts2;
}
if(((value & flag) != (uint32_t)RESET) && (iten))
{
return SET;
}
else
{
return RESET;
}
}
/**
* @brief clear flag status
* @param i2c_x: to select the i2c peripheral.
* this parameter can be one of the following values:
* I2C1, I2C2, I2C3.
* @param flag
* this parameter can be any combination of the following values:
* - I2C_BUSERR_FLAG: bus error flag.
* - I2C_ARLOST_FLAG: arbitration lost flag.
* - I2C_ACKFAIL_FLAG: acknowledge failure flag.
* - I2C_OUF_FLAG: overflow or underflow flag.
* - I2C_PECERR_FLAG: pec receive error flag.
* - I2C_TMOUT_FLAG: smbus timeout flag.
* - I2C_ALERTF_FLAG: smbus alert flag.
* - I2C_STOPF_FLAG: stop condition generation complete flag.
* - I2C_ADDR7F_FLAG: i2c 0~7 bit address match flag.
* @retval none
*/
void i2c_flag_clear(i2c_type *i2c_x, uint32_t flag)
{
i2c_x->sts1 = (uint16_t)~(flag & (uint32_t)0x0000DF00);
if(flag & I2C_ADDR7F_FLAG)
{
UNUSED(i2c_x->sts1);
UNUSED(i2c_x->sts2);
}
if(flag & I2C_STOPF_FLAG)
{
UNUSED(i2c_x->sts1);
i2c_x->ctrl1_bit.i2cen = TRUE;
}
}
/**
* @}
*/
#endif
/**
* @}
*/
/**
* @}
*/
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