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This commit is contained in:
Andreas Mieke 2018-04-03 17:18:28 +02:00
parent d109bae8d7
commit 9a18bd88f0
22 changed files with 286 additions and 122 deletions
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17
Mieke/SW/MT/rgb.c
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@ -1,6 +1,7 @@
#include "rgb.h"
#include "main.h"
// Define registers of the RGB LED driver
typedef enum {
RGB_SHUTDOWN = 0x00,
RGB_MAXCUR,
@ -15,14 +16,17 @@ typedef enum {
void rgb_send_command(uint8_t data)
{
// Generate start condition and transmit address
I2C_GenerateSTART(I2C1, ENABLE);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));
I2C_Send7bitAddress(I2C1, RGB_ADDR, I2C_Direction_Transmitter);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
// Send data
I2C_SendData(I2C1, data);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
// Generate stop condition
I2C_GenerateSTOP(I2C1, ENABLE);
return;
@ -30,36 +34,42 @@ void rgb_send_command(uint8_t data)
void init_rgb(void)
{
// Enable GPIOB anf I2C1 clocks
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1, ENABLE);
// Create gpio struct and fill it with default values
GPIO_InitTypeDef gpio;
GPIO_StructInit(&gpio);
// SCL
// SET PB6 to alternate function push pull (SCL)
gpio.GPIO_Mode = GPIO_Mode_AF_PP;
gpio.GPIO_Pin = GPIO_Pin_6;
GPIO_Init(GPIOB, &gpio);
// SDA
// Set PB7 to alternate function open drain (SDA)
gpio.GPIO_Mode = GPIO_Mode_AF_OD;
gpio.GPIO_Pin = GPIO_Pin_7;
GPIO_Init(GPIOB, &gpio);
// Init I2C1 to 400 kHz
I2C_InitTypeDef i2c;
I2C_StructInit(&i2c);
i2c.I2C_ClockSpeed = 400000;
I2C_Init(I2C1, &i2c);
// Enable I2C1 driver
I2C_Cmd(I2C1, ENABLE);
// LED actually allows 40mA, but driver only hanbdles around 30
// Set the max current the driver should allow
// LED actually allows 40mA, but driver only handles around 30
rgb_send_command(0x3F);
return;
}
void run_rgb(void)
{
// Set random colors for 100 ms each
rgb_send_command(0x5F);
wait(100);
rgb_send_command(0x7F);
@ -83,6 +93,7 @@ void run_rgb(void)
void deinit_rgb(void)
{
// Disable I2C1
I2C_Cmd(I2C1, DISABLE);
I2C_DeInit(I2C1);
return;