hello,
I am developing a project in IAR with tms507ls3137 processor.
I need to control the MIBSPI5NENA pin as GIO. When I change the following code to spiREG3, I can control the spi3NENA pin, but I can't control the spi1NENA, spi2NENA, spi4NENA and spi5NENA pins.
following code:
spiREG5->GCR0 = 1U;
spiREG5->PC0 &= ~(1<<8);
spiREG5->PC1 |= (1<<8);
spiREG5->PC3 |= (1<<8);
spiREG5->PC8 |= (1<<8);
spiREG5->PC4 |= (1<<8);
Hi Ali,
I tested your code today, but as i don't have LS3137 board i tested your code with TMS570LC4357.
And i found one issue with your code:
The only problem is you are trying to write into SPI registers without bringing out SPI out of RESET.
The bit-0 of control register-1 indicates the reset state of the device, if this bit is 0 means the SPI is in RESET state and if this bit is 1 then SPI is out of RESET.
You should write this bit to 1 before you are writing other SPI registers otherwise the value won't write into the corresponding registers.
so, just try to modify your code as below and test it:
int main(void)
{
/* USER CODE BEGIN (3) */
/** bring MIBSPI out of reset */
spiREG2->GCR0 = 0U;
spiREG2->GCR0 = 1U;
spiREG2->PC0 = 0x00000000;
spiREG2->PC1 = 0xFFFFFFFF;
spiREG2->PC3 = 0x00000000;
spiREG2->PC3 = 0xFFFFFFFF;
while(1)
{
}
/* USER CODE END */
return 0;
}
I tested at my end and after writing GCR0 RESET bit to 1 then everything works as expected.
--
Thanks & regards,
Jagadish.
In the following connection is LED + goes to SPI2CS1(ENA) pin. LED - goes to GND. But didn't turn on.
In the following connection is LED + goes to SPI2CS0 pin. LED - goes to GND. Led is turned on without any code changes. I tried other pins of the SPI2 port. All of the pins turned on the led except SPI2ENA.
Here is the code for this experiment:
Thank you.