yefj
Advanced Member level 4
Hello i have written the following code for efm32LG and tried to track the CLK SIGNAL when i do the transmit command for SPI.
i have used LOCATION0 as shown in the datasheet bellow and put my scope and when i passed threw my transmit command i didnt catch any clock signal at all.
Why could it happen?
Thanks
i have used LOCATION0 as shown in the datasheet bellow and put my scope and when i passed threw my transmit command i didnt catch any clock signal at all.
Why could it happen?
Thanks
Code:
#include "em_device.h"
#include "em_cmu.h"
#include "em_gpio.h"
#include "spidrv.h"
#include "dmadrv.h"
#include "em_usart.h"
#include "em_chip.h"
#include <stdint.h>
#include <stdbool.h>
#include "em_emu.h"
#include "bsp.h"
#include "bsp_trace.h"
#define LED_PORT_E gpioPortE
#define LED_PIN_E 15
#define LED_PORT_A gpioPortA
#define LED_PIN_A 15
#define USER_LOCATION 5
#define BUFFER_SIZE 1
char buffer[BUFFER_SIZE];
volatile uint32_t msTicks; /* counts 1ms timeTicks */
void Delay(uint32_t dlyTicks);
void SysTick_Handler(void)
{
msTicks++; /* increment counter necessary in Delay()*/
}
void Delay(uint32_t dlyTicks)
{
uint32_t curTicks;
curTicks = msTicks;
while ((msTicks - curTicks) < dlyTicks) ;
}
int main(void)
{
// uint8_t *pt;
int i,j;
i=0;
//start write update command
uint8_t B7_B0=0b11110000; //first 4 are dont care,first 4 bits data
uint8_t B15_B8=0b11111111;//data bits
uint8_t B23_B16=0b00000111;//channel A DATA total 0000 1111 1111 1111 last bin1
uint8_t B31_B24=0b00000011;//write to buffer and update DAC ,Write /rest dont care
//start end update command
uint8_t Recieved_D[4];
Recieved_D[0]=0b11111111;
Recieved_D[1]=0b11111111;
Recieved_D[2]=0b11111111;
Recieved_D[3]=0b11111111;
//Enable SDO register
uint8_t C31_C24=0b00001000; //enable DSO command
uint8_t C23_C16=0b00000000;
uint8_t C15_C8=0b00000000;
uint8_t C7_C0=0b00000010;// enable DSO bit
//NO OPeration COMMAND
// uint8_t D31_D24=0b00001110;
// uint8_t D23_D16=0b00000000;
// uint8_t D15_D8=0b00000000;
// uint8_t D7_D0=0b00000000;
//start read command 0000
uint8_t E7_E0=0b11110000; //first 4 are dont care,first 4 bits data
uint8_t E15_E8=0b11111111;//data bits
uint8_t E23_E16=0b00000000;//channel A rest is dont care
uint8_t E31_E24=0b00010000;//read
//start end update command
//NO OPeration COMMAND
uint8_t F31_F24=0b00001110;
uint8_t F23_F16=0b00000000;
uint8_t F15_F8=0b00000000;
uint8_t F7_F0=0b00000000;
// Chip errata
CHIP_Init();
// Enable oscillator to GPIO and USART1 modules
CMU_ClockEnable(cmuClock_GPIO, true);
CMU_ClockEnable(cmuClock_USART1, true);
CMU_ClockEnable(cmuClock_USART0, true);
// BSP_TraceProfilerSetup();
/* Setup SysTick Timer for 1 msec interrupts */
if (SysTick_Config(CMU_ClockFreqGet(cmuClock_CORE) / 1000)) {
while (1) ;
}
/* Initialize LED driver */
// BSP_LedsInit();
// BSP_LedSet(0);
// set pin modes for UART TX and RX pins
GPIO_PinModeSet(gpioPortC, 1, gpioModeInput, 0);
GPIO_PinModeSet(gpioPortC, 0, gpioModePushPull, 1);
///////////////////////////////////
USART_InitAsync_TypeDef init = USART_INITASYNC_DEFAULT;
USART_InitAsync(USART1, &init);
//defining location 5 so PORT C will be tx an rx for async uart
USART1->ROUTE |= USART_ROUTE_TXPEN | USART_ROUTE_RXPEN|USART_ROUTE_LOCATION_LOC0;
// GPIO_PinModeSet(LED_PORT_A,15,gpioModePushPull,1);
GPIO_PinModeSet(LED_PORT_E,15,gpioModePushPull,1);
GPIO_PinModeSet(LED_PORT_A,2,gpioModePushPull,1);
SPIDRV_HandleData_t handleData;
SPIDRV_Handle_t handle = &handleData;
SPIDRV_Init_t initData = SPIDRV_MASTER_USART0;
initData.csControl=spidrvCsControlApplication; //manual CS
initData.bitOrder=1; //MSB first send bit order
initData.portLocation = USART_ROUTE_LOCATION_LOC0; //defining location 0 for sync uart
SPIDRV_Init(handle,&initData);
GPIO_PinOutClear(LED_PORT_A,2); //chip select low starts transmition
SPIDRV_MTransmitB(handle, &B31_B24, 1);
SPIDRV_MTransmitB(handle, &B23_B16, 1);
SPIDRV_MTransmitB(handle, &B15_B8, 1);
SPIDRV_MTransmitB(handle, &B7_B0, 1);
GPIO_PinOutSet(LED_PORT_A,2); // chip select high,end transmition
Delay(1000);
//////////////////
GPIO_PinOutClear(LED_PORT_A,2); //chip select low starts transmition
SPIDRV_MTransmitB(handle, &C31_C24, 1);
SPIDRV_MTransmitB(handle, &C23_C16, 1);
SPIDRV_MTransmitB(handle, &C15_C8, 1);
SPIDRV_MTransmitB(handle, &C7_C0, 1);
GPIO_PinOutSet(LED_PORT_A,2); // chip select high,end transmition
Delay(1000);
//////////////
GPIO_PinOutClear(LED_PORT_A,2); //chip select low starts transmition
SPIDRV_MTransmitB(handle, &E31_E24, 1);
SPIDRV_MTransmitB(handle, &E23_E16, 1);
SPIDRV_MTransmitB(handle, &E15_E8, 1);
SPIDRV_MTransmitB(handle, &E7_E0, 1);
//////////////
GPIO_PinOutSet(LED_PORT_A,2); // chip select high,end transmition
Delay(1000);
GPIO_PinOutClear(LED_PORT_A,2); //chip select low starts transmition
SPIDRV_MTransmitB(handle, &F31_F24, 1);
SPIDRV_MTransmitB(handle, &F23_F16, 1);
SPIDRV_MTransmitB(handle, &F15_F8, 1);
SPIDRV_MTransmitB(handle, &F7_F0, 1);
GPIO_PinOutSet(LED_PORT_A,2); // chip select high,end transmition
// Initialize USART asynchronous mode and route pins
GPIO_PinOutClear(LED_PORT_A,2);
SPIDRV_MReceiveB(handle,&Recieved_D,4);
GPIO_PinOutSet(LED_PORT_A,2);
uint8_t * pt = (uint8_t*)(&Recieved_D);
while (1)
{
//E-green
//A-red
Delay(1000);
for (i = 0; i < 4 ; i ++ )
{
// USART_Tx(USART1,*(&Recieved_D+i));
USART_Tx(USART1,*(pt++));
}
USART_Tx(USART1, '\n');
GPIO_PinOutClear(LED_PORT_E,15);
Delay(5000);
GPIO_PinOutSet(LED_PORT_E,15);
Delay(5000);
}//end while(1)
}//end main