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comparison hw.c @ 10:0b75cff7c570

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Add _usleep16 - sleeps for cnt microseconds.
author Daniel O'Connor <darius@dons.net.au>
date Mon, 06 Feb 2012 23:54:36 +1030
parents 58d76cf522ff
children 96c345d304af
comparison
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9:be0a1ac64d97 10:0b75cff7c570
1 #include <stdint.h> 1 #include <stdint.h>
2 #include <stdio.h>
2 #include "stm32f10x.h" 3 #include "stm32f10x.h"
3 #include "lcd.h" 4 #include "lcd.h"
4 5
5 static void hw_port_cfg(void); 6 static void hw_port_cfg(void);
6 7
8 /* Wait for cnt microseconds */
9 void _usleep16(uint16_t cnt) {
10 TIM6->ARR = cnt;
11 TIM_SetCounter(TIM6, 0);
12 TIM_Cmd(TIM6, ENABLE);
13 while ((TIM6->CR1 & TIM_CR1_CEN) != 0)
14 ;
15
16 }
7 17
8 void hw_init(void) { 18 void hw_init(void) {
9 hw_port_cfg(); 19 hw_port_cfg();
10 lcd_init(); 20 lcd_init();
11 lcd_setpwm(1000); 21 lcd_setpwm(1000);
257 SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB; 267 SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
258 SPI_InitStructure.SPI_CRCPolynomial = 7; 268 SPI_InitStructure.SPI_CRCPolynomial = 7;
259 SPI_Init(SPI1, &SPI_InitStructure); 269 SPI_Init(SPI1, &SPI_InitStructure);
260 270
261 /* SPI1 enable */ 271 /* SPI1 enable */
262 SPI_Cmd(SPI1, ENABLE); 272 SPI_Cmd(SPI1, ENABLE);
273
274 /* Configure TIM6 for interval timing */
275 RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM6, ENABLE);
276
277 /* Reset TIM6 */
278 TIM_DeInit(TIM6);
279
280 /* Time Base configuration */
281 TIM_TimeBaseStructure.TIM_Period = 0;
282 TIM_TimeBaseStructure.TIM_Prescaler = (SystemCoreClock / 1000000) - 1; /* 1 MHz clock */
283 TIM_TimeBaseInit(TIM6, &TIM_TimeBaseStructure);
284
285 TIM_Cmd(TIM6, DISABLE);
286
287 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
288 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
289 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
290 GPIO_Init(GPIOE, &GPIO_InitStructure);
291
292 TIM_SelectOnePulseMode(TIM6, TIM_OPMode_Single);
293 TIM_UpdateDisableConfig(TIM6, DISABLE);
294
263 } 295 }