TI中文支持网Part Number:ADS1299
使用ADS199FE-PDK 透過SPI連接到 STM32F4052的開發版，mcu spi baud rate設置為2M，CPOL=LOW，CPHA=2 Edge，我開啟八通道的test signal輸入，使用邏輯分析儀發現每個通道的值差異不大，如圖1，但在每個SPI傳輸後，使用UART讓藍芽傳輸，SPI的值就會變得很奇怪，如圖二，請問是正常的嗎?
以及我該如何檢驗SPI的結果是正確的呢，謝謝
圖1邏輯分析儀結果
圖1 : 
圖2邏輯分析儀結果
圖2:
/* USER CODE BEGIN Header */
/********************************************************************************* @file: main.c* @brief: Main program body******************************************************************************* @attention** Copyright (c) 2024 STMicroelectronics.* All rights reserved.** This software is licensed under terms that can be found in the LICENSE file* in the root directory of this software component.* If no LICENSE file comes with this software, it is provided AS-IS.********************************************************************************/
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "stdio.h"
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
/* USER CODE END Includes */
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
/* USER CODE END PTD */
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD */
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
/* USER CODE END PM */
/* Private variables ---------------------------------------------------------*/
SPI_HandleTypeDef hspi1;
UART_HandleTypeDef huart1;
/* USER CODE BEGIN PV */
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_SPI1_Init(void);
static void MX_USART1_UART_Init(void);
/* USER CODE BEGIN PFP */
/* USER CODE END PFP */
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
/* USER CODE END 0 */
/*** @brief The application entry point.* @retval int*/
int main(void)
{HAL_Init();SystemClock_Config();MX_GPIO_Init();MX_SPI1_Init();MX_USART1_UART_Init();/* USER CODE BEGIN 2 *///int received_byte; // 定義接收字節變量HAL_GPIO_WritePin(GPIOC, reset_Pin, GPIO_PIN_SET);uint8_t RESET = 0x06; // 復位ADS1299命令HAL_Delay(1000);HAL_SPI_Transmit(&hspi1, (uint8_t*)&RESET, 1, 0x1000);HAL_Delay(1000);uint8_t ID = 0x00;//uint8_t為一個charuint8_t SDATAC = 0x11; // stop read datauint8_t RDATAC = 0x10; // 讀取連續數據uint8_t START = 0x08; // 啟動命令// uint8_t STOP = 0x0a; // 停止命令(未使用)// uint8_t WAKEUP = 0x02; // 喚醒命令(未使用)// uint8_t STANDBY = 0X04; // 待機命令(未使用)uint8_t test = 0x00; // 測試變量uint8_t CONFIG1 = 0x01; // 配置寄存器1uint8_t CONFIG2 = 0x02; // 配置寄存器2uint8_t CONFIG3 = 0x03; // 配置寄存器3uint8_t CH1SET = 0x05; // 設置通道1uint8_t CH2SET = 0x06; // 設置通道2uint8_t CH3SET = 0x07; // 設置通道3uint8_t CH4SET = 0x08; // 設置通道4uint8_t CH5SET = 0x09; // 設置通道5uint8_t CH6SET = 0x0A; // 設置通道6uint8_t CH7SET = 0x0B; // 設置通道7uint8_t CH8SET = 0x0C; // 設置通道8
//uint8_t BIAS_SENSP = 0x0D; // 設置Bias Drive Positive Derivation Register
//uint8_t BIAS_SENSN = 0x0E; // 設置Bias Drive Negative Derivation Register
//uint8_t LOFF_SENSP = 0x0F; // 設置Positive Signal Lead-Off Detection Register
//uint8_t LOFF_SENSN = 0x10; // 設置Negative Signal Lead-Off Detection Register
//uint8_t LOFF_FLIP = 0x11; // 設置Lead-Off Flip Register
//uint8_t LOFF_STATP = 0x12;
//uint8_t LOFF_STATN = 0X13;
//
//uint8_t GPIO = 0x14; // 設置GPIO
//uint8_t MISC1 = 0x15; // 設置MISC1
//uint8_t MISC2 = 0x16; // 設置MISC2
//uint8_t CONFIG4 = 0x17; // 設置寄存器4uint8_t received_Byte; // 定義接收字節變量uint32_t dataPacket = 0;uint32_t output[9] = {0};int counter = 0;int length;uint32_t data_test = 0x7FFFFF; // 測試數據uint32_t data_check = 0xFFFFFF; // 檢查數據uint32_t result[4]={0}; // 定義結果變量uint32_t result_before; // 定義先前結果變量
//int average_result_massiv[10] = {0}; // 定義平均結果數組
//int average_result; // 定義平均結果變量
//
//uint32_t noise_massive[100] = {0}; // 定義噪聲數組
//uint32_t final_noise_massive[100] = {0}; // 定義最終噪聲數組
//uint32_t summa_noise; // 定義噪聲總和變量int zad = 8; // 定義任務變量
//int i_count = 0; // 定義計數器變量
//int average_count = 0; // 定義平均計數器變量
//int pcktcnter = 0;uint8_t out1 = 0;uint8_t new_data_flag = 0;// 發送命令函數void send_command(uint8_t cmd){HAL_GPIO_WritePin(GPIOA, CS_Pin, GPIO_PIN_RESET);// 拉低CS引腳選擇芯片HAL_SPI_Transmit(&hspi1, (uint8_t*)&cmd,1, 0x1000);// 通過SPI發送命令,HAL_SPI_Transmit(SPI_HandleTypeDef *hspi, uint8_t *pData, uint16_t Size, uint32_t Timeout)HAL_GPIO_WritePin(GPIOA, CS_Pin, GPIO_PIN_SET);// 拉高CS引腳釋放芯片}void send_data_by_uart(uint32_t outputdata){//HAL_UART_Transmit(&huart1, &outputdata, sizeof(outputdata), 10); // Transmit the entire buffer//outputdata is a (4x24bit) array with 4 corresponding to 4 channels // step 1 - convert dataset char buffer = {0}; char buffer1[6] = {0}; sprintf(buffer1, "%06x", outputdata); for (int i=0;i<6;i++) { if (buffer1[i]!= '\0') {buffer = buffer1[i];HAL_UART_Transmit(&huart1, &buffer, 1, 10); //original timeout = 1000 } else { continue; } }//end of for (int i=0;i<6;i++) if (counter == 7) // if send_data_by_uart has run 4 times then it means all data channels have been transmitted {
buffer = '\n'; //send "\n" after all channels have been sent to BLE
HAL_UART_Transmit(&huart1, &buffer, 1, 10);
counter = 0; }// end of if(counter == 3)
else
{
counter += 1;
}}// end of send_data_by_uart // 寫入字節函數
void write_byte(uint8_t reg_addr, uint8_t val_hex)
{
HAL_GPIO_WritePin(GPIOA, CS_Pin, GPIO_PIN_RESET);// 拉低CS引腳電壓，選擇芯片使其動作
uint8_t adress = 0x40|reg_addr; // 定義寄存器地址
HAL_SPI_Transmit(&hspi1, (uint8_t*)&adress, 1, 0x1000);// 發送寄存器地址
HAL_SPI_Transmit(&hspi1, (uint8_t*)&test, 1, 0x1000);// 發送測試數據
HAL_SPI_Transmit(&hspi1, (uint8_t*)&val_hex, 1, 0x1000);// 發送要寫入的數據
HAL_GPIO_WritePin(GPIOA, CS_Pin, GPIO_PIN_SET);
} // 讀取字節函數
uint8_t read_byte(uint8_t reg_addr)
{
uint8_t out; // 定義輸出字節變量
HAL_GPIO_WritePin(GPIOA, CS_Pin, GPIO_PIN_RESET);// 拉低CS引腳電壓，選擇芯片使其動作
uint8_t adress = 0x20 | reg_addr ; // 定義寄存器地址
HAL_SPI_Transmit(&hspi1, (uint8_t*) &adress, 1 ,0x1000);// 發送寄存器地址
// HAL_SPI_Transmit(&hspi1, (uint8_t*)&test, 1, 0x1000);// 發送測試數據
// HAL_SPI_Receive(&hspi1, (uint8_t*)&out,1, 0x1000);
HAL_SPI_TransmitReceive(&hspi1,(uint8_t*)&adress,(uint8_t*)&out,1,0x1000); // 讀取寄存器數據
HAL_GPIO_WritePin(GPIOA, CS_Pin, GPIO_PIN_SET);// 拉高CS引腳釋放芯片
return(out);
} // 指示燈功能函數
void live_bits ()
{
HAL_Delay(100); // 延遲100毫秒
HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_0);// 翻轉PB0引腳電平
HAL_Delay(100);// 延遲100毫秒
}int measure_impedance()
{write_byte(CH1SET, 0x00); // 將值0x00寫入通道1write_byte(0x0D, 0x00);// 設置BIAS_SENSP寄存器，Disabled INxP to biaswrite_byte(0x0E, 0x00);// 設置BIAS_SENSN寄存器，Disabled INxN to BIASwrite_byte(0x0F, 0xFF);// 設置LOFF_SENSP寄存器，Enabled INxP lead off, positive side from each channel for lead-off detection
}HAL_GPIO_WritePin(GPIOA, CS_Pin, GPIO_PIN_RESET);send_command(SDATAC);HAL_Delay(1000);write_byte(ID, 0x3E);out1 = read_byte(0x00);write_byte(0x01, 0x95);//B5(1011 0110),Oscillator clock output enabled,fs=500Hz// 95 (1001 0110),fs=500Hzout1 = read_byte(0x01);write_byte(CONFIG2, 0xD0); //ti 板子設置test singal 由外部驅動
//write_byte(CONFIG2, 0xD4);//D4 (1101 0100),test singal 內部生成//test singal=2 X (-(Vrefp-Vrefn)/2400)//plused at fclk/(2^21)write_byte(CONFIG3, 0xF0); //ti 板子設置
//write_byte(CONFIG3, 0xEC);// EC (1111 1100),use internal ref_buffer//BIAS_IN connent MUX=010 的通道，BIASREF=(AVDD+AVSS)/2,bias connectwrite_byte(0x04, 0x00); ////ti 板子設置
//write_byte(0x04, 0x04); //Lead-Off Control Register, not allwrite_byte(0x0D, 0x00); //ti 板子設置
//write_byte(0x0D, 0x01); // 0F BIAS_SENSP: Bias Drive Positive Derivation Register，這邊指使用通道1參與BIAS的回饋write_byte(0x0E, 0x00); // 0F BIAS_SENSN: Bias Drive Negative Derivation Registerwrite_byte(0x0F, 0x00); // LOFF_SENSP: Positive Signal Lead-Off Detection Registerwrite_byte(0x10, 0x00); // LOFF_SENSN: Negative Signal Lead-Off Detection Registerwrite_byte(0x11, 0x00); // LOFF_FLIP: Lead-Off Flip Registerwrite_byte(0x12, 0x00); // (Read-Only) LOFF_STATP: Lead-Off Positive Signal Status Registerwrite_byte(0x13, 0x00); // (Read-Only)LOFF_STATN: Lead-Off Negative Signal Status Registerwrite_byte(0x14, 0x0F); //ti 板子設置
//write_byte(0x14, 0x3F); // GPIO 用於輸出write_byte(0x15, 0x00); //ti 板子設置
//write_byte(0x15, 0x20); // MISC1, 第5bit決定SRB1引道到各通道，SRB1接至反向輸入端write_byte(0x16, 0x00); // RESERVED
//write_byte(0x17, 0x00); // CONFIG4write_byte(CH1SET, 0x05); // (0110 1000)normal operation, gain=24, use srb1, normal inputwrite_byte(CH2SET, 0x05); // (0110 1000)normal operation, gain=24, use srb1, normal inputwrite_byte(CH3SET, 0x05); // (0110 1000)normal operation, gain=24, use srb1, normal inputwrite_byte(CH4SET, 0x05); // (0110 1000)normal operation, gain=24, use srb1, normal inputwrite_byte(CH5SET, 0x05); // (0110 1000)normal operation, gain=24, use srb1, normal input
////HAL_Delay(10);
////write_byte(CH6SET, 0x05); // (0110 1000)normal operation, gain=24, use srb1, normal input
////HAL_Delay(10);
////write_byte(CH7SET, 0x05); // (0110 1000)normal operation, gain=24, use srb1, normal input
////HAL_Delay(10);
////write_byte(CH8SET, 0x05); // (0110 1000)normal operation, gain=24, use srb1, normal input
//HAL_Delay(10);
// send_command(SDATAC);
// uint8_t read_reg = read_byte(CH1SET);
// send_data_by_uart(read_reg);HAL_GPIO_WritePin(GPIOA, CS_Pin, GPIO_PIN_SET);
// HAL_GPIO_WritePin(GPIOB, Start_Pin, GPIO_PIN_);HAL_Delay(1000);
// send_command(START);HAL_GPIO_WritePin(GPIOB, Start_Pin, GPIO_PIN_SET);HAL_Delay(10);send_command(RDATAC);HAL_Delay(10); //tsettle = 16393*500ns. 500ns = tclk, 16393 see datasheet pg 35
// int only_1_times=0;while (1)
{
// HAL_GPIO_WritePin(GPIOA, CS_Pin, GPIO_PIN_RESET);
// write_byte(CH1SET, 0x65);// 通道1: Input shorted
// write_byte(CH2SET, 0x65);// 通道2: Input shorted
// write_byte(CH3SET, 0x65);// 通道3: Input shorted
// write_byte(CH4SET, 0x65);// 通道4: Input shorted
// HAL_GPIO_WritePin(GPIOA, CS_Pin, GPIO_PIN_SET);
// HAL_Delay(2);
//measure_noise();
//if (HAL_GPIO_ReadPin(DRDY_GPIO_Port, DRDY_Pin) == GPIO_PIN_SET)
//{
// zad = 5;
//}
/* The code here separates channel data one-by-one, and then it packages the data by channels (8 packets, one per channel) and combines them into
one array to send out 8 packets at once. We need to change this. */if (HAL_GPIO_ReadPin(DRDY_GPIO_Port, DRDY_Pin) == GPIO_PIN_RESET ) //
//if (HAL_GPIO_ReadPin(DRDY_GPIO_Port, DRDY_Pin) == GPIO_PIN_RESET && zad==5){ //
//HAL_Delay(2);
// zad=0;
//CS_Pin 低電位開始寫入資料
HAL_GPIO_WritePin(GPIOA, CS_Pin, GPIO_PIN_RESET); //CS low //CS_Pin 低電位開始寫入資料
//Read SPI and convert data
for(int i = 0; i<9; i++) //4 channels
{
//dataPacket = 0;
for(int j = 0; j<3; j++) //3 bytes per channel
{
// byte dataByte = SPI.transfer(0x00);
HAL_SPI_TransmitReceive(&hspi1,(uint8_t*)&test,&received_Byte,1,0x1000);
// HAL_SPI_Receive(&hspi1,&received_Byte,1,100); //transmit & receive occur at the same time
dataPacket = (dataPacket<<8)|received_Byte;
} // end of for(int j = 0; j<3; j++)
output[i] = dataPacket;
//send_data_by_uart(output);
dataPacket = 0;
} //end of for(int i = 0; i<4; i++)
// HAL_Delay(20);
//uint32_t size = sizeof(output)/sizeof(output[0]);
for(int i = 1; i<9; i++)
{
send_data_by_uart(output[i]);
}
//Send data over UART
// send_data_by_uart(result);
// HAL_Delay(20);} // end of if(HAL_GPIO_ReadPin(DRDY_GPIO_Port, DRDY_Pin) == GPIO_PIN_RESET && zad==5)//HAL_Delay(2);} // end of while(1)
}//end of main
/*** @brief System Clock Configuration* @retval None*/
void SystemClock_Config(void)
{RCC_OscInitTypeDef RCC_OscInitStruct = {0};RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};/** Configure the main internal regulator output voltage*/__HAL_RCC_PWR_CLK_ENABLE();__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);/** Initializes the RCC Oscillators according to the specified parameters* in the RCC_OscInitTypeDef structure.*/RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;RCC_OscInitStruct.HSIState = RCC_HSI_ON;RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK){Error_Handler();}/** Initializes the CPU, AHB and APB buses clocks*/RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK){Error_Handler();}
}
/*** @brief SPI1 Initialization Function* @param None* @retval None*/
static void MX_SPI1_Init(void)
{/* USER CODE BEGIN SPI1_Init 0 *//* USER CODE END SPI1_Init 0 *//* USER CODE BEGIN SPI1_Init 1 *//* USER CODE END SPI1_Init 1 *//* SPI1 parameter configuration*/hspi1.Instance = SPI1;hspi1.Init.Mode = SPI_MODE_MASTER;hspi1.Init.Direction = SPI_DIRECTION_2LINES;hspi1.Init.DataSize = SPI_DATASIZE_8BIT;hspi1.Init.CLKPolarity = SPI_POLARITY_LOW;hspi1.Init.CLKPhase = SPI_PHASE_2EDGE;hspi1.Init.NSS = SPI_NSS_SOFT;hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_8;hspi1.Init.FirstBit = SPI_FIRSTBIT_MSB;hspi1.Init.TIMode = SPI_TIMODE_DISABLE;hspi1.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;hspi1.Init.CRCPolynomial = 10;if (HAL_SPI_Init(&hspi1) != HAL_OK){Error_Handler();}/* USER CODE BEGIN SPI1_Init 2 *//* USER CODE END SPI1_Init 2 */
}
/*** @brief USART1 Initialization Function* @param None* @retval None*/
static void MX_USART1_UART_Init(void)
{/* USER CODE BEGIN USART1_Init 0 *//* USER CODE END USART1_Init 0 *//* USER CODE BEGIN USART1_Init 1 *//* USER CODE END USART1_Init 1 */huart1.Instance = USART1;huart1.Init.BaudRate = 115200;huart1.Init.WordLength = UART_WORDLENGTH_8B;huart1.Init.StopBits = UART_STOPBITS_1;huart1.Init.Parity = UART_PARITY_NONE;huart1.Init.Mode = UART_MODE_TX_RX;huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;huart1.Init.OverSampling = UART_OVERSAMPLING_16;if (HAL_UART_Init(&huart1) != HAL_OK){Error_Handler();}/* USER CODE BEGIN USART1_Init 2 *//* USER CODE END USART1_Init 2 */
}
/*** @brief GPIO Initialization Function* @param None* @retval None*/
static void MX_GPIO_Init(void)
{GPIO_InitTypeDef GPIO_InitStruct = {0};
/* USER CODE BEGIN MX_GPIO_Init_1 */
/* USER CODE END MX_GPIO_Init_1 *//* GPIO Ports Clock Enable */__HAL_RCC_GPIOA_CLK_ENABLE();__HAL_RCC_GPIOC_CLK_ENABLE();__HAL_RCC_GPIOB_CLK_ENABLE();/*Configure GPIO pin Output Level */HAL_GPIO_WritePin(CS_GPIO_Port, CS_Pin, GPIO_PIN_RESET);/*Configure GPIO pin Output Level */HAL_GPIO_WritePin(reset_GPIO_Port, reset_Pin, GPIO_PIN_RESET);/*Configure GPIO pin Output Level */HAL_GPIO_WritePin(LED_GPIO_Port, LED_Pin, GPIO_PIN_SET);/*Configure GPIO pin Output Level */HAL_GPIO_WritePin(Start_GPIO_Port, Start_Pin, GPIO_PIN_RESET);/*Configure GPIO pin : DRDY_Pin */GPIO_InitStruct.Pin = DRDY_Pin;GPIO_InitStruct.Mode = GPIO_MODE_INPUT;GPIO_InitStruct.Pull = GPIO_NOPULL;HAL_GPIO_Init(DRDY_GPIO_Port, &GPIO_InitStruct);/*Configure GPIO pin : CS_Pin */GPIO_InitStruct.Pin = CS_Pin;GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;GPIO_InitStruct.Pull = GPIO_NOPULL;GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;HAL_GPIO_Init(CS_GPIO_Port, &GPIO_InitStruct);/*Configure GPIO pin : reset_Pin */GPIO_InitStruct.Pin = reset_Pin;GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;GPIO_InitStruct.Pull = GPIO_NOPULL;GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;HAL_GPIO_Init(reset_GPIO_Port, &GPIO_InitStruct);/*Configure GPIO pins : LED_Pin Start_Pin */GPIO_InitStruct.Pin = LED_Pin|Start_Pin;GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;GPIO_InitStruct.Pull = GPIO_NOPULL;GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
/* USER CODE BEGIN MX_GPIO_Init_2 */
/* USER CODE END MX_GPIO_Init_2 */
}
/* USER CODE BEGIN 4 */
/* USER CODE END 4 */
/*** @brief This function is executed in case of error occurrence.* @retval None*/
void Error_Handler(void)
{/* USER CODE BEGIN Error_Handler_Debug *//* User can add his own implementation to report the HAL error return state */__disable_irq();while (1){}/* USER CODE END Error_Handler_Debug */
}
#ifdef USE_FULL_ASSERT
/*** @brief Reports the name of the source file and the source line number*where the assert_param error has occurred.* @param file: pointer to the source file name* @param line: assert_param error line source number* @retval None*/
void assert_failed(uint8_t *file, uint32_t line)
{/* USER CODE BEGIN 6 *//* User can add his own implementation to report the file name and line number,ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) *//* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */
Taylor：
您好
建议您到英文技术论坛进行提问，TI的工程师会解答您的问题。E2E英文：https://e2e.ti.com
