SPI problems, no interrupt?

[basvandijk86]

Posted on December 07, 2007 at 10:04

SPI problems, no interrupt?

[basvandijk86]

Posted on December 05, 2007 at 04:30

I’m using the STR730 on the Hitex STR730 evaluation board (via Keil). I have problems with receiving SPI data. When I watch with a scope I see there is data running over the bus, but it seems that the STR does not get a receive interrupt.

I did not use DMA (is this recommended?) because I did never use it before when using SPI. On the evaluation board there is a 7segments led display which I want to change when he receives an interrupt. But so far he is not changing anything, so not receiving anything! Here is my code, am I missing something? I did make use of the example code which is on the ST site. Main.c/* Standard include ------------------------------------------------------------*/ #include ''main.h'' /* Include of other module interface headers -----------------------------------*/ /* Local includes --------------------------------------------------------------*/ /* Private typedef -------------------------------------------------------------*/ /* Private define --------------------------------------------------------------*/ /* Private macro ---------------------------------------------------------------*/ /* Private variables -----------------------------------------------------------*/ const unsigned char LED7SEG[] = { 0xC0, 0xF9, 0xA4, 0xB0, 0x99, 0x92, 0x82, 0xF8, 0x80, 0x90, 0x88, 0x83, 0xC6, 0xA1, 0x86, 0x8E } ; GPIO_InitTypeDef GPIO_InitStructure; BSPI_InitTypeDef BSPI_InitStructure; PRCCU_InitTypeDef PRCCU_InitStructure; /* Private function prototypes -------------------------------------------------*/ /* Interface functions ---------------------------------------------------------*/ /* Private functions -----------------------------------------------------------*/ /******************************************************************************* * Function Name : wait * Description : wait statement * Input : None * Output : None * Return : None *******************************************************************************/ void wait(void) { u32 i; for (i=100000L; i!=0 ; i-- ) {} } /******************************************************************************* * Function Name : SPI0_Init * Description : Initialize SPI0 perifpheral * Input : None * Output : None * Return : None *******************************************************************************/ void SPI0_init() { /* BSPI0 configuration -------------------------------------------------------*/ BSPI_InitStructure.BSPI_RxFifoSize = 5; BSPI_InitStructure.BSPI_TxFifoSize = 5; BSPI_InitStructure.BSPI_SSPin = BSPI_SSPin_Used; BSPI_InitStructure.BSPI_CPOL = BSPI_CPOL_High; BSPI_InitStructure.BSPI_CPHA = BSPI_CPHA_1Edge; BSPI_InitStructure.BSPI_WordLength = BSPI_WordLength_8b; BSPI_InitStructure.BSPI_Mode = BSPI_Mode_Slave; BSPI_RxITConfig(BSPI0, BSPI_RxIT_RFNE | BSPI_RxIT_RFF); BSPI_Init(BSPI0, &BSPI_InitStructure); } /******************************************************************************* * Function Name : GPI0_Init * Description : Initialize GPI0 * Input : None * Output : None * Return : None *******************************************************************************/ void GPIO_init() { /* GPIO pins configuration ---------------------------------------------------*/ /* BSPI0 pins configuration */ GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_TRI_TTL; GPIO_InitStructure.GPIO_Pins = GPIO_PIN_11 | GPIO_PIN_12 | GPIO_PIN_13 | GPIO_PIN_14; GPIO_Init(GPIO6, &GPIO_InitStructure); /* Setup GPIO0 - 7 segment LED displays (P0.0 .. P0.9)*/ GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT_PP; GPIO_InitStructure.GPIO_Pins = GPIO_PIN_ALL; GPIO_Init(GPIO0, &GPIO_InitStructure); } /******************************************************************************* * Function Name : MLCK_Config * Description : Master CLK settings * Input : None * Output : None * Return : None *******************************************************************************/ void MCLK_Config (void) { PRCCU_InitTypeDef Clock; CMU_InitTypeDef ClockInit; Clock.PRCCU_DIV2=DISABLE; Clock.PRCCU_MCLKSRC_SRC=PRCCU_MCLKSRC_PLL; Clock.PRCCU_PLLDIV=PRCCU_PLLMUL_12; Clock.PRCCU_PLLMUL=PRCCU_PLLDIV_6; ClockInit.CMU_RCOscControl=0x0; ClockInit.CMU_EndCountValue=0x0; ClockInit.CMU_FreqRef_High=0x0; ClockInit.CMU_FreqRef_Low=0x0; ClockInit.CMU_CKSEL0=0x0; ClockInit.CMU_CKSEL1=0x0; ClockInit.CMU_CKSEL2=CMU_CKSEL0_CKOSC; CMU_Lock (DISABLE); CMU_Init (&ClockInit); PRCCU_Init(&Clock); /* Peripheral clock configuration --------------------------------------------*/ /* enable GPIO 0, 4, 5 and 6 clock */ CFG_PeripheralClockConfig(CFG_CLK_GPIO0, ENABLE); CFG_PeripheralClockConfig(CFG_CLK_GPIO4, ENABLE); CFG_PeripheralClockConfig(CFG_CLK_GPIO5, ENABLE); CFG_PeripheralClockConfig(CFG_CLK_GPIO6, ENABLE); /* enable BSPI 0 clock */ CFG_PeripheralClockConfig(CFG_CLK_BSPI0, ENABLE); /* enable EIC clock */ CFG_PeripheralClockConfig(CFG_CLK_EIC, ENABLE); } void SPI_interrupt() { /* Enable global interrupts */ EIC_IRQChannelConfig(BSPI0_IRQChannel,ENABLE); EIC_IRQChannelPriorityConfig(BSPI0_IRQChannel, 1); /* enable the Interrupt controller to manage IRQ channel*/ EIC_IRQCmd(ENABLE); BSPI_Cmd(BSPI0, ENABLE); /* Enable BSPI0 */ // disable interrupts globally EIC_IRQCmd(DISABLE); } /******************************************************************************* * Function Name : main * Description : main function, where program start. * Input : None * Output : None * Return : None *******************************************************************************/ int main() { #ifdef DEBUG debug(); #endif MCLK_Config(); GPIO_init(); SPI0_init(); GPIO_WordWrite(GPIO0, LED7SEG[0] | 0x0100); while(1) { SPI_interrupt(); if (ReceivedData != 0x0){ GPIO_WordWrite(GPIO0, LED7SEG[2] | 0x0100); } } } 73x_it.c/******************************************************************************* * Function Name : BSPI0_IRQHandler * Description : This function handles the BSPI0 interrupt request. * Input : None * Output : None * Return : None *******************************************************************************/ void BSPI0_IRQHandler (void) { ReceivedData = BSPI_WordReceive(BSPI0); GPIO_WordWrite(GPIO0, 0x88 | 0x0100); }

[christophe239955_st]

Posted on December 07, 2007 at 10:04

why do you need to disable the interrupt EIC_IRQCmd(DISABLE); in SPI_interrupt() function? try to comment this in your code to allow interrupt to be served.