Laurent Huot / Mbed 2 deprecated SPI

drtgddf

Dependencies:   mbed

main.cpp@1:2b2be189b4db, 2016-01-11 (annotated)

Committer:
larryspaghetti
Date:
Mon Jan 11 21:09:20 2016 +0000
Revision:
1:2b2be189b4db
Parent:
0:aab1f335cf6b 
f

Who changed what in which revision?

UserRevisionLine numberNew contents of line
larryspaghetti 0:aab1f335cf6b 1 #include "mbed.h"
larryspaghetti 1:2b2be189b4db 2 #include "LPC17xx.h"
larryspaghetti 0:aab1f335cf6b 3
larryspaghetti 0:aab1f335cf6b 4
larryspaghetti 0:aab1f335cf6b 5 int main() {
larryspaghetti 1:2b2be189b4db 6 UART3_init();
larryspaghetti 1:2b2be189b4db 7
larryspaghetti 1:2b2be189b4db 8 UART3_putc('C');
larryspaghetti 1:2b2be189b4db 9 }
larryspaghetti 1:2b2be189b4db 10
larryspaghetti 1:2b2be189b4db 11 void UART3_init()
larryspaghetti 1:2b2be189b4db 12 {
larryspaghetti 1:2b2be189b4db 13 const uint32_t baudrate = 9600;
larryspaghetti 1:2b2be189b4db 14
larryspaghetti 1:2b2be189b4db 15 //On "power on" le module UART3
larryspaghetti 1:2b2be189b4db 16 LPC_SC->PCONP |= (1<<25);
larryspaghetti 1:2b2be189b4db 17
larryspaghetti 1:2b2be189b4db 18 //On met le device clock a CPU CLOCK/1
larryspaghetti 1:2b2be189b4db 19 LPC_SC->PCLKSEL1 &= ~(3<<18);
larryspaghetti 1:2b2be189b4db 20 LPC_SC->PCLKSEL1 |= (1<<18);
larryspaghetti 1:2b2be189b4db 21
larryspaghetti 1:2b2be189b4db 22 //Formule: registreValue = Clock du chip / (16*baudrate)
larryspaghetti 1:2b2be189b4db 23 uint8_t dllRegValue = 96000000 / (16 * baudrate);
larryspaghetti 1:2b2be189b4db 24
larryspaghetti 1:2b2be189b4db 25 //On set le bit DLAB a 1
larryspaghetti 1:2b2be189b4db 26 LPC_UART3->LCR = (1 << 7);
larryspaghetti 1:2b2be189b4db 27 //On donne la valeur au registre DLL pour que le baudrate soit 9600
larryspaghetti 1:2b2be189b4db 28 LPC_UART3->DLL = dllRegValue;
larryspaghetti 1:2b2be189b4db 29
larryspaghetti 1:2b2be189b4db 30 //8 bit de message, 1 bit de stop, pas de bit de parite
larryspaghetti 1:2b2be189b4db 31 LPC_UART3->LCR = 3;
larryspaghetti 1:2b2be189b4db 32
larryspaghetti 1:2b2be189b4db 33 //On allume le FIFO
larryspaghetti 1:2b2be189b4db 34 LPC_UART3->FCR = 1;
larryspaghetti 1:2b2be189b4db 35
larryspaghetti 1:2b2be189b4db 36 //Selection des pins pour UART3
larryspaghetti 1:2b2be189b4db 37 LPC_PINCON->PINSEL0 |= 0x00000002;
larryspaghetti 1:2b2be189b4db 38
larryspaghetti 1:2b2be189b4db 39
larryspaghetti 1:2b2be189b4db 40 }
larryspaghetti 1:2b2be189b4db 41
larryspaghetti 1:2b2be189b4db 42 void UART3_putc(char c)
larryspaghetti 1:2b2be189b4db 43 {
larryspaghetti 1:2b2be189b4db 44 //Il faut attendre que le transfert soit fini pour envoyer un deuxieme caractere
larryspaghetti 1:2b2be189b4db 45 LPC_UART3->THR = c;
larryspaghetti 1:2b2be189b4db 46
larryspaghetti 1:2b2be189b4db 47 //Tant que le registre de transmiter n'est pas vide
larryspaghetti 1:2b2be189b4db 48 while (true)
larryspaghetti 1:2b2be189b4db 49 {
larryspaghetti 1:2b2be189b4db 50 if (LPC_UART3->LSR & (1 << 5))
larryspaghetti 1:2b2be189b4db 51 {
larryspaghetti 1:2b2be189b4db 52 break;
larryspaghetti 1:2b2be189b4db 53 }
larryspaghetti 0:aab1f335cf6b 54 }
larryspaghetti 1:2b2be189b4db 55 }