tejashs
Member level 1
hello guys,
i have started to learn ARM cortex m3 lpc1768 processor.
I am able to toggle bits, change CPU click frequency .
now i am stuck with UART programming, its not working
i tried to follow the UM and also the sample programs given
here is my code, can someone have a look at it
i am using coocox with GNU ARM compiler
edit: can some one take a quick look and gimme atleast some hints about where to look for the problem
i am using flash magic to download the hexfile so hardware might be file
i have started to learn ARM cortex m3 lpc1768 processor.
I am able to toggle bits, change CPU click frequency .
now i am stuck with UART programming, its not working
i tried to follow the UM and also the sample programs given
here is my code, can someone have a look at it
Code C - [expand] 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 void Uart0Init(uint32_t BaudRate) { uint32_t uartclk = 0,pclk = 0; LPC_PINCON->PINSEL0 &= ~0xF0; // configure P0.2 and P0.3 as RXD-0 and TXD-0 Pins LPC_PINCON->PINSEL0 |= 0x50; // read the clock division assigned to UART0 peripheral uartclk = (LPC_SC->PCLKSEL0 >> 6) & 0x03; switch (uartclk) { case 0x01: pclk = SystemCoreClock; break; case 0x02: pclk = SystemCoreClock / 2; break; case 0x03: pclk = SystemCoreClock / 8; break; case 0x00: default: pclk = SystemCoreClock / 4; break; } // Configure the Line Control Register // Also set the Divisor Latch Access Bit LPC_UART0->LCR = 0x83; pclk = pclk / (16 * BaudRate); LPC_UART0->DLM = pclk / 256; LPC_UART0->DLL = pclk % 256; LPC_UART0->FCR = 0x07; LPC_UART0->LCR = 0x03; LPC_UART0->IER = 0x00; }
Code C - [expand] 1 2 3 4 5 6 7 8 9 10 11 12 int main(void) { uint32_t i=0; SystemInit(); Uart0Init(9600); while(1) { LPC_UART0->THR = 'T'; while (LPC_UART0->LSR & 0x20 ); for(i=0;i<0xffff;i++); } }
i am using coocox with GNU ARM compiler
edit: can some one take a quick look and gimme atleast some hints about where to look for the problem
i am using flash magic to download the hexfile so hardware might be file
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