63 lines
1.3 KiB
C
63 lines
1.3 KiB
C
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/*
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* uart.c
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*
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* Created on: 15 Mar 2022
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* Author: pika
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*/
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#include "uart.h"
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#ifdef __USE_CMSIS
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#include "LPC17xx.h"
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#endif
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void uart_init(uint32_t baudrate){
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LPC_SC->PCLKSEL0 &= ~(3<<6);
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LPC_SC->PCLKSEL0 |= 1<<6; // pclk set to 100 MHz
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LPC_PINCON->PINSEL0 |= (1<<4); //TXD0
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LPC_PINCON->PINSEL0 |= (1<<6); //RXD0
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uint32_t Fdiv = (UART_PCLK)/(16*baudrate);
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LPC_UART0->LCR = 0x83;
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LPC_UART0->DLM = (Fdiv>>8)&0xff;
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LPC_UART0->DLL = Fdiv&0xff;
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LPC_UART0->LCR = 0x3;
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LPC_UART0->FCR = 0x07|(2<<6);//(2<<6) to active RX trigger level
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}
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void uart_send(char* buff, uint32_t length){
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int tmp;
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while (length-- != 0 ){
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LPC_UART0->THR = *buff++;
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while(((LPC_UART0->LSR)&(1<<5)) == 0);//stuck in while when U1THR contains valid data
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tmp = LPC_UART0->RBR;
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LPC_GPIO2->FIOCLR = 0xff;
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LPC_GPIO2->FIOSET = tmp;
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}
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}
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void uart_receive_command(char* chara){
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char* curr = chara;
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while(strncmp(curr, "\r\n", 2) != 0){
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while(((LPC_UART0->LSR)&(1)) == 0);
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*curr = LPC_UART0->RBR;
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if(strncmp(curr, "\r\n", 2) != 0) curr++;
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}
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}
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void uart_receive_data(uint8_t* chara){
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uint8_t* curr = chara;
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while(*curr != '\0'){
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while(((LPC_UART0->LSR)&(1)) == 0);
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*curr = LPC_UART0->RBR;
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curr++;
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}
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}
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