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Added an example for STM32-H103 eval board to drive the ZJ168 addressable led strips, using the LPD6803 controller.

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This commit is contained in:
Piotr Esden-Tempski 2011-03-13 20:41:28 -07:00
parent 1f3e431527
commit af33448c09
4 changed files with 288 additions and 2 deletions
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10
examples/stm32/stm32-h103/Makefile
View File

@ -24,7 +24,7 @@ Q := @
MAKEFLAGS += --no-print-directory
endif
all: miniblink fancyblink usart usart_irq usart_printf usart_irq_printf timer usb_cdcacm usb_hid button exti_both traceswo
all: miniblink fancyblink usart usart_irq usart_printf usart_irq_printf timer usb_cdcacm usb_hid button exti_both traceswo led_stripe
miniblink:
@printf " BUILD examples/stm32/stm32-h103/miniblink\n"
@ -78,6 +78,10 @@ traceswo:
@printf " BUILD examples/stm32/stm32-h103/traceswo\n"
$(Q)$(MAKE) -C traceswo
led_stripe:
@printf " BUILD examples/stm32/stm32-h103/led_stripe\n"
$(Q)$(MAKE) -C led_stripe
clean:
@printf " CLEAN examples/stm32/stm32-h103/miniblink\n"
$(Q)$(MAKE) -C miniblink clean
@ -103,6 +107,8 @@ clean:
$(Q)$(MAKE) -C exti_both clean
@printf " CLEAN examples/stm32/stm32-h103/traceswo\n"
$(Q)$(MAKE) -C traceswo clean
@printf " CLEAN examples/stm32/stm32-h103/led_stripe\n"
$(Q)$(MAKE) -C led_stripe clean
.PHONY: miniblink fancyblink usart usart_irq usart_printf usart_irq_printf timer spi usb_cdcacm usb_hid button exti_both traceswo clean
.PHONY: miniblink fancyblink usart usart_irq usart_printf usart_irq_printf timer spi usb_cdcacm usb_hid button exti_both traceswo led_stripe clean

23
examples/stm32/stm32-h103/led_stripe/Makefile Normal file
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@ -0,0 +1,23 @@
##
## This file is part of the libopencm3 project.
##
## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
##
## This program is free software: you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published by
## the Free Software Foundation, either version 3 of the License, or
## (at your option) any later version.
##
## This program is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
## GNU General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with this program. If not, see <http://www.gnu.org/licenses/>.
##
BINARY = led_stripe
include ../../Makefile.include

226
examples/stm32/stm32-h103/led_stripe/led_stripe.c Normal file
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@ -0,0 +1,226 @@
/*
* This file is part of the libopencm3 project.
*
* Copyright (C) 2011 Piotr Esden-Tempski <piotr@esden.net>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* This example is implementing the protocol of ZJ168 addressable led
* strips. These strips use the LPD6803 controller. You may be able to
* find the datasheet here:
* http://www.adafruit.com/datasheets/LPD6803.pdf
*/
#include <libopencm3/stm32/rcc.h>
#include <libopencm3/stm32/gpio.h>
#define SPI_BANK GPIOB
#define SCLK_PIN GPIO13
#define MOSI_PIN GPIO15
#define SMALL_DELAY_VALUE 0
#define COLOR_COUNT 50
#define SCLK(VAL) \
if (VAL) { \
gpio_set(SPI_BANK, SCLK_PIN); \
} else { \
gpio_clear(SPI_BANK, SCLK_PIN); \
}
#define MOSI(VAL) \
if (VAL) { \
gpio_set(SPI_BANK, MOSI_PIN); \
} else { \
gpio_clear(SPI_BANK, MOSI_PIN); \
}
#define SMALL_DELAY() { \
int j; \
for (j = 0; j < SMALL_DELAY_VALUE; j++) \
__asm__("nop"); \
}
struct color {
u8 r;
u8 g;
u8 b;
};
/* Set STM32 to 72 MHz. */
void clock_setup(void)
{
rcc_clock_setup_in_hse_8mhz_out_72mhz();
/* Enable GPIOC clock. */
rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPCEN);
rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPBEN);
}
void gpio_setup(void)
{
/* Set GPIO12 (in GPIO port C) to 'output push-pull'. */
gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_50_MHZ,
GPIO_CNF_OUTPUT_PUSHPULL, GPIO12);
gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_50_MHZ,
GPIO_CNF_OUTPUT_PUSHPULL, GPIO13);
gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_50_MHZ,
GPIO_CNF_OUTPUT_PUSHPULL, GPIO15);
}
void send_colors(struct color *colors, int count) {
int i, k;
/* initialize spi pins */
SCLK(0);
MOSI(0);
/* start frame */
for (i=0; i<32; i++) {
SCLK(1);
SMALL_DELAY();
SCLK(0);
SMALL_DELAY();
}
/* color cell output */
for (k = 0; k < count; k++) {
/* Start bit */
MOSI(1);
SCLK(1);
SMALL_DELAY();
SCLK(0);
SMALL_DELAY();
/* Blue */
for (i=0; i<5; i++) {
MOSI(((colors[k].b & ((1 << 4) >> i)) != 0));
SCLK(1);
SMALL_DELAY();
SCLK(0);
SMALL_DELAY();
}
/* Red */
for (i=0; i<5; i++) {
MOSI(((colors[k].r & ((1 << 4) >> i)) != 0));
SCLK(1);
SMALL_DELAY();
SCLK(0);
SMALL_DELAY();
}
/* Green */
for (i=0; i<5; i++) {
MOSI(((colors[k].g & ((1 << 4) >> i)) != 0));
SCLK(1);
SMALL_DELAY();
SCLK(0);
SMALL_DELAY();
}
}
/* End frame */
MOSI(0);
for (k=0; k < count; k++) {
SCLK(1);
SMALL_DELAY();
SCLK(0);
SMALL_DELAY();
}
}
void reset_colors(struct color *colors, int count) {
int i;
for (i=0; i<count; i++) {
colors[i].r = 0;
colors[i].g = 0;
colors[i].b = 0;
}
}
void init_colors(struct color *colors, int count) {
int i;
colors[0].r = 0x1F;
colors[0].g = 0;
colors[0].b = 0;
colors[1].r = 0;
colors[1].g = 0x1F;
colors[1].b = 0;
colors[2].r = 0;
colors[2].g = 0;
colors[2].b = 0x1F;
}
void step_colors(struct color *colors, int count) {
int i;
struct color tmp_color1;
struct color tmp_color2;
/* generate next colors */
tmp_color1.r = colors[0].r;
tmp_color1.g = colors[0].g;
tmp_color1.b = colors[0].b;
colors[0].r = colors[count-1].r;
colors[0].g = colors[count-1].g;
colors[0].b = colors[count-1].b;
for(i=1; i<count; i++) {
tmp_color2.r = colors[i].r;
tmp_color2.g = colors[i].g;
tmp_color2.b = colors[i].b;
colors[i].r = tmp_color1.r;
colors[i].g = tmp_color1.g;
colors[i].b = tmp_color1.b;
tmp_color1.r = tmp_color2.r;
tmp_color1.g = tmp_color2.g;
tmp_color1.b = tmp_color2.b;
}
}
int main(void)
{
int i;
struct color colors[COLOR_COUNT];
clock_setup();
gpio_setup();
reset_colors(colors, COLOR_COUNT);
init_colors(colors, COLOR_COUNT);
while (1) {
gpio_toggle(GPIOC, GPIO12); /* LED on/off */
send_colors(colors, COLOR_COUNT);
step_colors(colors, COLOR_COUNT);
/* Wait a little */
for (i = 0; i < 500000; i++) /* Wait a bit. */
__asm__("nop");
}
/* Blink the LED (PC12) on the board. */
while (1) {
}
return 0;
}

31
examples/stm32/stm32-h103/led_stripe/led_stripe.ld Normal file
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@ -0,0 +1,31 @@
/*
* This file is part of the libopencm3 project.
*
* Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/* Linker script for Olimex STM32-H103 (STM32F103RBT6, 128K flash, 20K RAM). */
/* Define memory regions. */
MEMORY
{
rom (rx) : ORIGIN = 0x08000000, LENGTH = 128K
ram (rwx) : ORIGIN = 0x20000000, LENGTH = 20K
}
/* Include the common ld script. */
INCLUDE libopencm3_stm32.ld