Vincent Belanger / Mbed 2 deprecated APP

APP 1 S5.

Dependencies:   mbed

UART.cpp@13:08ef55cd14c6, 2016-01-12 (annotated)

Committer:
vinbel93
Date:
Tue Jan 12 15:17:21 2016 +0000
Revision:
13:08ef55cd14c6
UART without mbed.h

Who changed what in which revision?

UserRevisionLine numberNew contents of line
vinbel93 13:08ef55cd14c6 1 // UART.cpp
vinbel93 13:08ef55cd14c6 2 // Vincent Belanger - belv1802
vinbel93 13:08ef55cd14c6 3 // Jeremy Pare - parj2713
vinbel93 13:08ef55cd14c6 4
vinbel93 13:08ef55cd14c6 5 #include <stdint.h>
vinbel93 13:08ef55cd14c6 6
vinbel93 13:08ef55cd14c6 7 #include "UART.h"
vinbel93 13:08ef55cd14c6 8 #include "APP.h"
vinbel93 13:08ef55cd14c6 9 #include "LPC17xx.h"
vinbel93 13:08ef55cd14c6 10
vinbel93 13:08ef55cd14c6 11
vinbel93 13:08ef55cd14c6 12 void UARTInit(uint32_t baudrate)
vinbel93 13:08ef55cd14c6 13 {
vinbel93 13:08ef55cd14c6 14 uint32_t Fdiv;
vinbel93 13:08ef55cd14c6 15 uint32_t pclkdiv, pclk;
vinbel93 13:08ef55cd14c6 16
vinbel93 13:08ef55cd14c6 17 // Select UART3
vinbel93 13:08ef55cd14c6 18 LPC_PINCON->PINSEL0 &= ~0x00000003;
vinbel93 13:08ef55cd14c6 19 LPC_PINCON->PINSEL0 |= 0x00000002;
vinbel93 13:08ef55cd14c6 20
vinbel93 13:08ef55cd14c6 21 LPC_SC->PCONP |= 1 << 25; // Activate UART3 in PCONP register.
vinbel93 13:08ef55cd14c6 22 pclkdiv = (LPC_SC->PCLKSEL1 >> 18) & 0x03; // Bits 18~19 are for UART3
vinbel93 13:08ef55cd14c6 23
vinbel93 13:08ef55cd14c6 24 switch (pclkdiv)
vinbel93 13:08ef55cd14c6 25 {
vinbel93 13:08ef55cd14c6 26 case 0x00:
vinbel93 13:08ef55cd14c6 27 default:
vinbel93 13:08ef55cd14c6 28 pclk = SystemCoreClock/4;
vinbel93 13:08ef55cd14c6 29 break;
vinbel93 13:08ef55cd14c6 30 case 0x01:
vinbel93 13:08ef55cd14c6 31 pclk = SystemCoreClock;
vinbel93 13:08ef55cd14c6 32 break;
vinbel93 13:08ef55cd14c6 33 case 0x02:
vinbel93 13:08ef55cd14c6 34 pclk = SystemCoreClock/2;
vinbel93 13:08ef55cd14c6 35 break;
vinbel93 13:08ef55cd14c6 36 case 0x03:
vinbel93 13:08ef55cd14c6 37 pclk = SystemCoreClock/8;
vinbel93 13:08ef55cd14c6 38 break;
vinbel93 13:08ef55cd14c6 39 }
vinbel93 13:08ef55cd14c6 40
vinbel93 13:08ef55cd14c6 41 LPC_UART3->LCR = 0x83; // 8 bits, no Parity, 1 Stop bit, DLAB = 1
vinbel93 13:08ef55cd14c6 42 Fdiv = (pclk / 16) / baudrate; // baud rate
vinbel93 13:08ef55cd14c6 43 LPC_UART3->DLM = Fdiv / 256; // MSB
vinbel93 13:08ef55cd14c6 44 LPC_UART3->DLL = Fdiv % 256; // LSB
vinbel93 13:08ef55cd14c6 45 LPC_UART3->LCR = 0x03; // DLAB = 0
vinbel93 13:08ef55cd14c6 46 }
vinbel93 13:08ef55cd14c6 47
vinbel93 13:08ef55cd14c6 48 void UARTSend(uint8_t byte)
vinbel93 13:08ef55cd14c6 49 {
vinbel93 13:08ef55cd14c6 50 LPC_UART3->THR = byte;
vinbel93 13:08ef55cd14c6 51 }
vinbel93 13:08ef55cd14c6 52
vinbel93 13:08ef55cd14c6 53 void UARTSend(uint8_t *buffer, uint32_t length)
vinbel93 13:08ef55cd14c6 54 {
vinbel93 13:08ef55cd14c6 55 while (length != 0)
vinbel93 13:08ef55cd14c6 56 {
vinbel93 13:08ef55cd14c6 57 LPC_UART3->THR = *buffer;
vinbel93 13:08ef55cd14c6 58 buffer++;
vinbel93 13:08ef55cd14c6 59 length--;
vinbel93 13:08ef55cd14c6 60 }
vinbel93 13:08ef55cd14c6 61 }