STM32驱动 AT21CS01 单总线eeprom 源码

/* * at21cs01.c * * Created on: Oct 7, 2023 * Author: kotzulla */ #include "at21cs01.h" AT21CS01_Struct *at21cs01_Settings; uint8_t at21cs01_slaveAddress=0; uint8_t CommSpeed=0; GPIO_InitTypeDef GPIO_InitStruct = {0}; void at21cs01_Init(AT21CS01_Struct *settings) { at21cs01_Settings=settings; HAL_TIM_Base_Start(at21cs01_Settings->timer); } void at21cs01_delay_us (uint16_t us) { __HAL_TIM_SET_COUNTER(at21cs01_Settings->timer,0); while (__HAL_TIM_GET_COUNTER(at21cs01_Settings->timer) < us); } void at21cs01_delay_ms(uint16_t us){ HAL_Delay(us); } void at21cs01_SIO_SetHigh() { at21cs01_Settings->TX_RX_GPIO->BSRR = at21cs01_Settings->TX_RX_GPIO_Pin; } void at21cs01_SIO_SetLow() { at21cs01_Settings->TX_RX_GPIO->BSRR = (uint32_t)at21cs01_Settings->TX_RX_GPIO_Pin << 16U; } uint8_t at21cs01_SIO_GetValue() { uint8_t res=0; //set input mode uint32_t temp = at21cs01_Settings->TX_RX_GPIO->MODER; temp &= ~(GPIO_MODER_MODER0 << ((uint32_t)at21cs01_Settings->TX_RX_GPIO_Pin * 2U)); temp |= ((GPIO_MODE_INPUT & GPIO_MODE) << ((uint32_t)at21cs01_Settings->TX_RX_GPIO_Pin * 2U)); at21cs01_Settings->TX_RX_GPIO->MODER = temp; if((at21cs01_Settings->TX_RX_GPIO->IDR & at21cs01_Settings->TX_RX_GPIO_Pin) != 0)res= 1; //set output mode temp = at21cs01_Settings->TX_RX_GPIO->MODER; temp &= ~(GPIO_MODER_MODER0 << ((uint32_t)at21cs01_Settings->TX_RX_GPIO_Pin * 2U)); temp |= ((GPIO_MODE_OUTPUT_PP & GPIO_MODE) << ((uint32_t)at21cs01_Settings->TX_RX_GPIO_Pin * 2U)); at21cs01_Settings->TX_RX_GPIO->MODER = temp; return res; } uint8_t at21cs01_ackNack(){ uint8_t temp; if (CommSpeed == 0) { at21cs01_SIO_SetLow(); at21cs01_delay_us(1); at21cs01_SIO_SetHigh(); at21cs01_delay_us(1); if(at21cs01_SIO_GetValue() == 0){ temp = 0x00;} else { temp = 0xFF; } at21cs01_delay_us(9); at21cs01_SIO_SetHigh(); } else { at21cs01_SIO_SetLow(); at21cs01_delay_us(4); at21cs01_SIO_SetHigh(); at21cs01_delay_us(2); if(at21cs01_SIO_GetValue() == 0){ temp = 0x00;} else { temp = 0xFF; } at21cs01_delay_us(34); at21cs01_SIO_SetHigh(); } return temp; } uint8_t at21cs01_discoveryResponse(){ uint8_t temp; at21cs01_SIO_SetHigh(); at21cs01_delay_us(200); at21cs01_SIO_SetLow(); at21cs01_delay_us(500); at21cs01_SIO_SetHigh(); at21cs01_delay_us(20); at21cs01_SIO_SetLow(); at21cs01_delay_us(1); at21cs01_SIO_SetHigh(); at21cs01_delay_us(2); if(at21cs01_SIO_GetValue() == 0){ temp = 0x00; } else { temp = 0xFF; } at21cs01_delay_us(21); at21cs01_SIO_SetHigh(); CommSpeed = 0; return temp; } void at21cs01_startHS(){ at21cs01_SIO_SetHigh(); if (CommSpeed == 0) { at21cs01_delay_us(200); } else { at21cs01_delay_us(650); } } void at21cs01_tx1(){ if (CommSpeed ==0) { at21cs01_SIO_SetLow(); at21cs01_delay_us(1); at21cs01_SIO_SetHigh(); at21cs01_delay_us(14); } else { at21cs01_SIO_SetLow(); at21cs01_delay_us(4); at21cs01_SIO_SetHigh(); at21cs01_delay_us(41); } } void at21cs01_tx0(){ if (CommSpeed == 0) { at21cs01_SIO_SetLow(); at21cs01_delay_us(10); at21cs01_SIO_SetHigh(); at21cs01_delay_us(5); } else { at21cs01_SIO_SetLow(); at21cs01_delay_us(24); at21cs01_SIO_SetHigh(); at21cs01_delay_us(21); } } uint8_t at21cs01_txByte(uint8_t dataByte){ uint8_t temp; for (uint8_t ii = 0; ii < 8 ; ii++){ if (0x80 & dataByte) { at21cs01_tx1(); } else { at21cs01_tx0(); } dataByte <<= 1; } temp = at21cs01_ackNack(); return temp; } uint8_t at21cs01_readByte (){ uint8_t temp; uint8_t dataByte = 0x00; if (CommSpeed == 0) { for (int8_t ii = 0; ii < 8 ; ii++){ at21cs01_SIO_SetLow(); at21cs01_delay_us(1); at21cs01_SIO_SetHigh(); at21cs01_delay_us(1); asm("NOP"); asm("NOP"); temp = at21cs01_SIO_GetValue(); temp &= 0x01; dataByte = (uint8_t)((dataByte << 1) | temp); at21cs01_delay_us(9); } } else { for (int8_t ii = 0; ii < 8 ; ii++){ at21cs01_SIO_SetLow(); at21cs01_delay_us(4); at21cs01_SIO_SetHigh(); at21cs01_delay_us(2); temp = at21cs01_SIO_GetValue(); temp &= 0x01; dataByte = (uint8_t)((dataByte << 1) | temp); at21cs01_delay_us(34); } } return dataByte; } uint8_t at21cs01_scanDeviceAddress(){ uint8_t temp; uint8_t address; for(uint8_t ii =0; ii < 8; ii++) { if(at21cs01_discoveryResponse() == 0) { at21cs01_startHS(); temp = ii; temp <<= 1; temp |= 0xA0; if(at21cs01_txByte(temp) == 0x00) { address = ii; address <<= 1; at21cs01_startHS(); break; } } } if(at21cs01_Settings->debug==1){ printf(" Slave Address = "); if (address == 0x00) {printf("000b\n");} if (address == 0x02) {printf("001b\n");} if (address == 0x04) {printf("010b\n");} if (address == 0x06) {printf("011b\n");} if (address == 0x08) {printf("100b\n");} if (address == 0x0A) {printf("101b\n");} if (address == 0x0C) {printf("110b\n");} if (address == 0x0E) {printf("111b\n");} } at21cs01_slaveAddress=address; return address; } uint8_t at21cs01_eepromwrite(uint8_t cmd, uint8_t address, uint8_t Data[],uint8_t size){ if(size>8)return 1; cmd |=at21cs01_slaveAddress; at21cs01_startHS(); at21cs01_txByte(cmd); at21cs01_txByte(address); for (uint8_t ii = 0; ii < size; ii++) { at21cs01_txByte(Data[ii]); } at21cs01_startHS(); at21cs01_delay_ms(5); return 0; } uint8_t at21cs01_WriteToAddress(uint8_t address, uint8_t Data[],uint8_t size) { return at21cs01_eepromwrite(AT21CS01_CMD_EEPROMREADWRITE,address,Data,size); } void at21cs01_ReadFromAddress(uint8_t address, uint8_t *readData, uint8_t size){ uint8_t cmd=AT21CS01_CMD_EEPROMREADWRITE; cmd |=at21cs01_slaveAddress; at21cs01_startHS(); at21cs01_txByte(cmd); at21cs01_txByte(address); at21cs01_startHS(); at21cs01_txByte((uint8_t)(cmd | 0x01)); for (uint8_t ii = 0; ii < size; ii++) { readData[ii] = at21cs01_readByte(); if (ii < (size-1)) { at21cs01_tx0(); } } at21cs01_tx1(); at21cs01_startHS(); if(at21cs01_Settings->debug==1){ printf(" Data Read ="); for (uint8_t ii = 0; ii < size; ii++) { printf(" 0x"); printf("%02X", readData[ii]); } printf("\n"); } } void at21cs01_currentRead(uint8_t cmd, uint8_t *readData, uint8_t size){ cmd |= at21cs01_slaveAddress; at21cs01_startHS(); at21cs01_txByte((uint8_t)(cmd | 0x01)); for (uint8_t ii = 0; ii < size; ii++) { readData[ii] = at21cs01_readByte(); if (ii < (size-1)) { at21cs01_tx0(); } } at21cs01_tx1(); at21cs01_startHS(); if(at21cs01_Settings->debug==1){ printf(" Current Address ="); for (uint8_t ii = 0; ii < size; ii++) { printf(" 0x"); printf("%02X", readData[ii]); } printf("\n"); } } uint8_t at21cs01_setCommuncationSpeed(uint8_t speed){ uint8_t temp; speed |= at21cs01_slaveAddress; at21cs01_startHS(); temp = at21cs01_txByte((uint8_t)(speed)); at21cs01_startHS(); if (((speed & 0xF0) == AT21CS01_SPEED_SLOW) & (temp == 0x00)){ CommSpeed = 1; } else { CommSpeed = 0; } return temp; }