mirror of
https://github.com/dimoniche/solarium.vlad.git
synced 2026-01-30 04:53:30 +03:00
130 lines
2.3 KiB
C
130 lines
2.3 KiB
C
#include "iolpc2368.h"
|
|
#include "ucos_ii.h"
|
|
#include <stdlib.h>
|
|
#include "cpu.h"
|
|
#include "spi1.h"
|
|
|
|
#ifdef CONFIG_SPI1_ENABLE
|
|
|
|
static OS_EVENT *Spi1Lock = NULL;
|
|
|
|
void spi1_setSpeed(unsigned int speed_hz)
|
|
{
|
|
if (speed_hz <= 100000)
|
|
{
|
|
SSP1CPSR_bit.CPSDVSR = 255; // 100 kHz
|
|
}
|
|
else if (speed_hz <= 400000)
|
|
{
|
|
SSP1CPSR_bit.CPSDVSR = 96; // 375 kHz
|
|
}
|
|
else
|
|
{
|
|
SSP1CPSR_bit.CPSDVSR = 6; // ~10 MHz
|
|
}
|
|
}
|
|
|
|
unsigned char spi1_exchange(unsigned char c)
|
|
{
|
|
while(!SSP1SR_bit.TFE);
|
|
SSP1DR = c;
|
|
while(SSP1SR_bit.BSY);
|
|
while(!SSP1SR_bit.RNE);
|
|
return SSP1DR;
|
|
}
|
|
|
|
void spi1_init(void)
|
|
{
|
|
// on spi power
|
|
PCONP_bit.PCSSP1 = 1;
|
|
|
|
// clk = cclk
|
|
PCLKSEL0_bit.PCLK_SSP1 = 1;
|
|
|
|
// SD CARD CS
|
|
PINSEL0_bit.P0_6 = 0x0;
|
|
PINMODE0_bit.P0_6 = 0;
|
|
FIO0DIR_bit.P0_6 = 1;
|
|
FIO0MASK_bit.P0_6 = 0;
|
|
FIO0SET_bit.P0_6 = 1;
|
|
|
|
// MUSIC SHIELD CS
|
|
PINSEL4_bit.P2_12 = 0x0;
|
|
PINMODE4_bit.P2_12 = 0;
|
|
FIO2DIR_bit.P2_12 = 1;
|
|
FIO2MASK_bit.P2_12 = 0;
|
|
FIO2SET_bit.P2_12 = 1;
|
|
|
|
// pin select
|
|
PINSEL0_bit.P0_7 = 0x2; // SCK1
|
|
PINMODE0_bit.P0_7 = 2;
|
|
FIO0MASK_bit.P0_7 = 1;
|
|
|
|
PINSEL0_bit.P0_8 = 0x2; // MISO1
|
|
PINMODE0_bit.P0_8 = 2;
|
|
FIO0MASK_bit.P0_8 = 1;
|
|
|
|
PINSEL0_bit.P0_9 = 0x2; // MOSI1
|
|
PINMODE0_bit.P0_9 = 2;
|
|
FIO0MASK_bit.P0_9 = 1;
|
|
|
|
SSP1CR0_bit.DSS = 7; // 8-bit
|
|
SSP1CR0_bit.FRF = 0; // spi
|
|
SSP1CR0_bit.SPO = 0;
|
|
SSP1CR0_bit.SPH = 0;
|
|
SSP1CR0_bit.SCR = 1;
|
|
|
|
SSP1CR1_bit.LBM = 0;
|
|
SSP1CR1_bit.SSE = 1;
|
|
SSP1CR1_bit.MS = 0; // master
|
|
SSP1CR1_bit.SOD = 0;
|
|
|
|
SSP1CPSR_bit.CPSDVSR = 4;
|
|
|
|
SSP1IMSC = 0;
|
|
SSP1DMACR = 0;
|
|
|
|
if (!Spi1Lock) Spi1Lock = OSSemCreate(1);
|
|
}
|
|
|
|
|
|
void spi1_selectChip(unsigned char spi)
|
|
{
|
|
if (spi == SPI1_CS_SD_CARD)
|
|
{
|
|
FIO0CLR_bit.P0_6 = 1;
|
|
}
|
|
else if (spi == SPI1_CS_MUSIC_SHIELD)
|
|
{
|
|
FIO2CLR_bit.P2_12 = 1;
|
|
}
|
|
}
|
|
|
|
void spi1_unselectChip(unsigned char spi)
|
|
{
|
|
if (spi == SPI1_CS_SD_CARD)
|
|
{
|
|
FIO0SET_bit.P0_6 = 1;
|
|
}
|
|
else if (spi == SPI1_CS_MUSIC_SHIELD)
|
|
{
|
|
FIO2SET_bit.P2_12 = 1;
|
|
}
|
|
}
|
|
|
|
void spi1_getSem()
|
|
{
|
|
CPU_INT08U err;
|
|
do{
|
|
OSSemPend(Spi1Lock, 1, &err);
|
|
if (!err) break;
|
|
OSTimeDly(1);
|
|
}while (err);
|
|
}
|
|
|
|
void spi1_freeSem()
|
|
{
|
|
OSSemPost(Spi1Lock);
|
|
}
|
|
|
|
#endif // CONFIG_SPI1_ENABLE
|