Hi, Please help me to know why the following example code for SPI of STM32L152VD is not working, I do not see any signals in scope on pins SCK and MOSI niether in Data register in dubugger.
void SPI_Master_init(void) { GPIO_InitTypeDef GPIO_InitStruct; SPI_InitTypeDef SPI_InitStruct; /* Initialization and Configuration functions *********************************/ // enable peripheral clock RCC_AHBPeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE); RCC_AHBPeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE); RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE); RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB, ENABLE); GPIO_InitStruct.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7; GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF; GPIO_InitStruct.GPIO_OType = GPIO_OType_PP; GPIO_InitStruct.GPIO_Speed = GPIO_Speed_40MHz; GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_NOPULL; GPIO_Init(GPIOA, &GPIO_InitStruct); GPIO_InitStruct.GPIO_Pin = GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15; GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF; GPIO_InitStruct.GPIO_OType = GPIO_OType_PP; GPIO_InitStruct.GPIO_Speed = GPIO_Speed_40MHz; GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_NOPULL; GPIO_Init(GPIOB, &GPIO_InitStruct); // connect SPI1 pins to SPI alternate function GPIO_PinAFConfig(GPIOA, GPIO_PinSource5, GPIO_AF_SPI1); GPIO_PinAFConfig(GPIOA, GPIO_PinSource6, GPIO_AF_SPI1); GPIO_PinAFConfig(GPIOA, GPIO_PinSource7, GPIO_AF_SPI1); // // connect SPI2 pins to SPI alternate function GPIO_PinAFConfig(GPIOB, GPIO_PinSource13, GPIO_AF_SPI2); GPIO_PinAFConfig(GPIOB, GPIO_PinSource14, GPIO_AF_SPI2); GPIO_PinAFConfig(GPIOB, GPIO_PinSource15, GPIO_AF_SPI2); SPI_InitStruct.SPI_Direction = SPI_Direction_2Lines_FullDuplex; // set to full duplex SPI_InitStruct.SPI_Mode = SPI_Mode_Master; // transmit in master mode, NSS pin has SPI_InitStruct.SPI_DataSize = SPI_DataSize_8b; // one packet of data is 8 bits wide SPI_InitStruct.SPI_CPOL = SPI_CPOL_Low; // clock is low when idle SPI_InitStruct.SPI_CPHA = SPI_CPHA_1Edge; // data sampled at first edge SPI_InitStruct.SPI_NSS = SPI_NSS_Hard; // set the NSS HARD SPI_InitStruct.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256; // SPI frequency is SPI_InitStruct.SPI_FirstBit = SPI_FirstBit_MSB;// data is transmitted MSB first SPI_Init(SPI1, &SPI_InitStruct); SPI_SSOutputCmd(SPI1,ENABLE); //Set SSOE bit in SPI_CR1 register SPI_Cmd(SPI1, ENABLE); // enable SPI1 SPI_InitStruct.SPI_Direction = SPI_Direction_2Lines_FullDuplex; // set to full duplex SPI_InitStruct.SPI_Mode = SPI_Mode_Master; // transmit in master mode, NSS pin has SPI_InitStruct.SPI_DataSize = SPI_DataSize_8b; // one packet of data is 8 bits wide SPI_InitStruct.SPI_CPOL = SPI_CPOL_Low; // clock is low when idle SPI_InitStruct.SPI_CPHA = SPI_CPHA_1Edge; // data sampled at first edge SPI_InitStruct.SPI_NSS = SPI_NSS_Hard; // set the NSS HARD SPI_InitStruct.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256; // SPI frequency is SPI_InitStruct.SPI_FirstBit = SPI_FirstBit_MSB;// data is transmitted MSB first SPI_Init(SPI2, &SPI_InitStruct); SPI_SSOutputCmd(SPI2,ENABLE); //Set SSOE bit in SPI_CR1 register SPI_Cmd(SPI2, ENABLE); // enable SPI2
and in main:
int main(void){ SPI_Master_init(); while(1) { SPI_I2S_SendData(SPI1, 0xFFFF); SPI1->DR = 0x11; SPI_I2S_SendData(SPI2,0xFFFF); SPI2->DR = 0x11;
I tried on a new board with STM32L152VD 100pin by correcting the below the problem solved.
RCC_AHBPeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE); RCC_AHBPeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE); corrected to RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE); RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE);
My last code for SPI1 and SPI2 is in below where I see signals in scope for SCK and MOSI
GPIO_InitTypeDef GPIO_InitStruct; SPI_InitTypeDef SPI_InitStruct; NVIC_InitTypeDef NVIC_InitStructure; NVIC_InitStructure.NVIC_IRQChannel = SPI1_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); NVIC_InitStructure.NVIC_IRQChannel = SPI2_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); ///* Initialization and Configuration functions *********************************/ // // enable peripheral clock RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE); RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE); RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB, ENABLE); GPIO_InitStruct.GPIO_Pin = GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15; GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF; GPIO_InitStruct.GPIO_OType = GPIO_OType_PP; GPIO_InitStruct.GPIO_Speed = GPIO_Speed_2MHz; GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_NOPULL; GPIO_Init(GPIOB, &GPIO_InitStruct); // connect SPI3 pins to SPI alternate function GPIO_PinAFConfig(GPIOB, GPIO_PinSource13, GPIO_AF_SPI2); GPIO_PinAFConfig(GPIOB, GPIO_PinSource14, GPIO_AF_SPI2); GPIO_PinAFConfig(GPIOB, GPIO_PinSource15, GPIO_AF_SPI2); SPI_InitStruct.SPI_Direction = SPI_Direction_2Lines_FullDuplex; // set to full duplex SPI_InitStruct.SPI_Mode = SPI_Mode_Master; // transmit in master mode, NSS pin has SPI_InitStruct.SPI_DataSize = SPI_DataSize_8b; // one packet of data is 8 bits wide SPI_InitStruct.SPI_CPOL = SPI_CPOL_Low; // clock is low when idle SPI_InitStruct.SPI_CPHA = SPI_CPHA_1Edge; // data sampled at first edge SPI_InitStruct.SPI_NSS = SPI_NSS_Hard; // set the NSS HARD SPI_InitStruct.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256; // SPI frequency is SPI_InitStruct.SPI_FirstBit = SPI_FirstBit_MSB;// data is transmitted MSB first SPI_Init(SPI2, &SPI_InitStruct); //================SPI1 GPIO_InitStruct.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7; GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF; GPIO_InitStruct.GPIO_OType = GPIO_OType_PP; GPIO_InitStruct.GPIO_Speed = GPIO_Speed_2MHz; GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_NOPULL; GPIO_Init(GPIOA, &GPIO_InitStruct); // connect SPI3 pins to SPI alternate function GPIO_PinAFConfig(GPIOA, GPIO_PinSource5, GPIO_AF_SPI1); GPIO_PinAFConfig(GPIOA, GPIO_PinSource6, GPIO_AF_SPI1); GPIO_PinAFConfig(GPIOA, GPIO_PinSource7, GPIO_AF_SPI1); SPI_InitStruct.SPI_Direction = SPI_Direction_2Lines_FullDuplex; // set to full duplex SPI_InitStruct.SPI_Mode = SPI_Mode_Master; // transmit in master mode, NSS pin has SPI_InitStruct.SPI_DataSize = SPI_DataSize_8b; // one packet of data is 8 bits wide SPI_InitStruct.SPI_CPOL = SPI_CPOL_Low; // clock is low when idle SPI_InitStruct.SPI_CPHA = SPI_CPHA_1Edge; // data sampled at first edge SPI_InitStruct.SPI_NSS = SPI_NSS_Hard; // set the NSS HARD SPI_InitStruct.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256; // SPI frequency is SPI_InitStruct.SPI_FirstBit = SPI_FirstBit_MSB;// data is transmitted MSB first SPI_Init(SPI1, &SPI_InitStruct); SPI_SSOutputCmd(SPI2,ENABLE); //Set SSOE bit in SPI_CR1 register SPI_Cmd(SPI2, ENABLE); // enable SPI2 SPI_SSOutputCmd(SPI1,ENABLE); //Set SSOE bit in SPI_CR1 register SPI_Cmd(SPI1, ENABLE); // enable SPI2 }
Hi Hamed,
Could you also show your main function code and IRQ_HANDLERS.
I would like to be able to reproduce this.
Thank You, Gary
Dear Gary,
My main function is a simple command to send data out from MOSI pin as below also I didn't need to write anything in IRQ_HANDLERS by now so they are empty:
#include "SPI_test.h" #include "stm32l1xx.h" int main(void) { SPI_Master_init(); while(1) { SPI_I2S_SendData(SPI2,0x11); } }
You need to wait on the TXE status, not jam data out in a tight loop.
Hamed Adldoost Posted 2-Jul-2015 20:13 GMT
Dear Pier, Thanks. I corrected the code. RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2,ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1,ENABLE); Yet I don't have signals.
So you already corrected that before.
Hamed Adldoost Posted 4-Jul-2015 08:49 GMT
So you have at least three boards, only the 100pin edition works?
Dear John, Other boards are okay now. I tried different codes, may be I had a mistake in other lines. with the last code my other boards now function well too.