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pca9685_driver.c
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pca9685_driver.c
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/*
* pca9685_driver.c - Driver for PCA9685 16-channel LED driver chips over I2C bus
*
* Copyright 2015 Dan Green
*
* Author: Dan Green ([email protected])
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
* See http://creativecommons.org/licenses/MIT/ for more information.
*
* -----------------------------------------------------------------------------
*/
#include <stm32f4xx.h>
//#include "stm32f4xx_gpio.h"
//#include "stm32f4xx_i2c.h"
//#include "stm32f4xx_spi.h"
//#include "stm32f4xx_rcc.h"
#include "inouts.h"
#include "pca9685_driver.h"
#define delay(x) \
do { \
register unsigned int i; \
for (i = 0; i < x; ++i) \
__asm__ __volatile__ ("nop\n\t":::"memory"); \
} while (0)
__IO uint32_t LEDDriverTimeout = LEDDRIVER_LONG_TIMEOUT;
void LEDDriver_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
/* Enable I2S and I2C GPIO clocks */
RCC_AHB1PeriphClockCmd(LEDDRIVER_I2C_GPIO_CLOCK, ENABLE);
/* LEDDRIVER_I2C SCL and SDA pins configuration -------------------------------------*/
GPIO_InitStructure.GPIO_Pin = LEDDRIVER_I2C_SCL_PIN | LEDDRIVER_I2C_SDA_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(LEDDRIVER_I2C_GPIO, &GPIO_InitStructure);
/* Connect pins to I2C peripheral */
GPIO_PinAFConfig(LEDDRIVER_I2C_GPIO, LEDDRIVER_I2S_SCL_PINSRC, LEDDRIVER_I2C_GPIO_AF);
GPIO_PinAFConfig(LEDDRIVER_I2C_GPIO, LEDDRIVER_I2S_SDA_PINSRC, LEDDRIVER_I2C_GPIO_AF);
}
void LEDDriver_I2C_Init(void)
{
I2C_InitTypeDef I2C_InitStructure;
/* Enable the LEDDRIVER_I2C peripheral clock */
RCC_APB1PeriphClockCmd(LEDDRIVER_I2C_CLK, ENABLE);
/* LEDDRIVER_I2C peripheral configuration */
I2C_DeInit(LEDDRIVER_I2C);
I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;
I2C_InitStructure.I2C_OwnAddress1 = 0x34;
I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
I2C_InitStructure.I2C_ClockSpeed = I2C1_SPEED;
/* Enable the I2C peripheral */
I2C_Cmd(LEDDRIVER_I2C, ENABLE);
I2C_Init(LEDDRIVER_I2C, &I2C_InitStructure);
}
uint32_t LEDDRIVER_TIMEOUT_UserCallback(void)
{
/* nothing */
return 1;
}
uint32_t LEDDriver_writeregister(uint8_t driverAddr, uint8_t RegisterAddr, uint8_t RegisterValue){
uint32_t result = 0;
driverAddr = PCA9685_I2C_BASE_ADDRESS | (driverAddr << 1);
//driverAddr = 0b10000000;
/*!< While the bus is busy */
LEDDriverTimeout = LEDDRIVER_LONG_TIMEOUT;
while(I2C_GetFlagStatus(LEDDRIVER_I2C, I2C_FLAG_BUSY))
{
if((LEDDriverTimeout--) == 0)
return LEDDRIVER_TIMEOUT_UserCallback();
}
/* Start the config sequence */
I2C_GenerateSTART(LEDDRIVER_I2C, ENABLE);
LEDDriverTimeout = LEDDRIVER_FLAG_TIMEOUT;
while (!I2C_CheckEvent(LEDDRIVER_I2C, I2C_EVENT_MASTER_MODE_SELECT))
{
if((LEDDriverTimeout--) == 0)
return LEDDRIVER_TIMEOUT_UserCallback();
}
/* Transmit the slave address */
I2C_Send7bitAddress(LEDDRIVER_I2C, driverAddr, I2C_Direction_Transmitter);
LEDDriverTimeout = LEDDRIVER_FLAG_TIMEOUT;
while (!I2C_CheckEvent(LEDDRIVER_I2C, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED))
{
if((LEDDriverTimeout--) == 0)
return LEDDRIVER_TIMEOUT_UserCallback();
}
/* Transmit the address for write operation */
I2C_SendData(LEDDRIVER_I2C, RegisterAddr);
/* Test on EV8 and clear it */
LEDDriverTimeout = LEDDRIVER_FLAG_TIMEOUT;
while (!I2C_CheckEvent(LEDDRIVER_I2C, I2C_EVENT_MASTER_BYTE_TRANSMITTING))
{
if((LEDDriverTimeout--) == 0)
return LEDDRIVER_TIMEOUT_UserCallback();
}
/* Prepare the register value to be sent */
I2C_SendData(LEDDRIVER_I2C, RegisterValue);
/*!< Wait till all data have been physically transferred on the bus */
LEDDriverTimeout = LEDDRIVER_LONG_TIMEOUT;
while(!I2C_GetFlagStatus(LEDDRIVER_I2C, I2C_FLAG_BTF))
{
if((LEDDriverTimeout--) == 0)
return LEDDRIVER_TIMEOUT_UserCallback();
}
/* End the configuration sequence */
I2C_GenerateSTOP(LEDDRIVER_I2C, ENABLE);
/* Return the verifying value: 0 (Passed) or 1 (Failed) */
return result;
}
inline uint32_t LEDDriver_startxfer(uint8_t driverAddr){
uint32_t result=0;
driverAddr = PCA9685_I2C_BASE_ADDRESS | (driverAddr << 1);
/*!< While the bus is busy */
LEDDriverTimeout = LEDDRIVER_LONG_TIMEOUT;
while(I2C_GetFlagStatus(LEDDRIVER_I2C, I2C_FLAG_BUSY))
{
if((LEDDriverTimeout--) == 0)
return LEDDRIVER_TIMEOUT_UserCallback();
}
/* Start the config sequence */
I2C_GenerateSTART(LEDDRIVER_I2C, ENABLE);
LEDDriverTimeout = LEDDRIVER_FLAG_TIMEOUT;
while (!I2C_CheckEvent(LEDDRIVER_I2C, I2C_EVENT_MASTER_MODE_SELECT))
{
if((LEDDriverTimeout--) == 0)
return LEDDRIVER_TIMEOUT_UserCallback();
}
/* Transmit the slave address */
I2C_Send7bitAddress(LEDDRIVER_I2C, driverAddr, I2C_Direction_Transmitter);
LEDDriverTimeout = LEDDRIVER_FLAG_TIMEOUT;
while (!I2C_CheckEvent(LEDDRIVER_I2C, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED))
{
if((LEDDriverTimeout--) == 0)
return LEDDRIVER_TIMEOUT_UserCallback();
}
return result;
}
inline uint32_t LEDDriver_senddata(uint8_t data){
uint32_t result=0;
/* Transmit the data for write operation */
I2C_SendData(LEDDRIVER_I2C, data);
LEDDriverTimeout = LEDDRIVER_FLAG_TIMEOUT;
while (!I2C_CheckEvent(LEDDRIVER_I2C, I2C_EVENT_MASTER_BYTE_TRANSMITTING))
{
if((LEDDriverTimeout--) == 0)
return LEDDRIVER_TIMEOUT_UserCallback();
}
return result;
}
inline void LEDDriver_endxfer(void){
/* End the configuration sequence */
I2C_GenerateSTOP(LEDDRIVER_I2C, ENABLE);
}
void LEDDriver_set_LED_ring(uint16_t ring[20][3], uint16_t env_out[6][3]){
uint8_t i,driverAddr;
for (driverAddr=0;driverAddr<4;driverAddr++){
LEDDriver_startxfer(driverAddr);
LEDDriver_senddata(PCA9685_LED0);
for (i=driverAddr*5;i<(5+(driverAddr*5));i++){
LEDDriver_senddata(0); //on-time = 0
LEDDriver_senddata(0);
LEDDriver_senddata(ring[i][0] & 0xFF); //off-time = brightness
LEDDriver_senddata((ring[i][0] >> 8) & 0xFF);
LEDDriver_senddata(0); //on-time = 0
LEDDriver_senddata(0);
LEDDriver_senddata(ring[i][1] & 0xFF); //off-time = brightness
LEDDriver_senddata((ring[i][1] >> 8) & 0xFF);
LEDDriver_senddata(0); //on-time = 0
LEDDriver_senddata(0);
LEDDriver_senddata(ring[i][2] & 0xFF); //off-time = brightness
LEDDriver_senddata((ring[i][2] >> 8) & 0xFF);
}
//Channel 6 ENVOUT LED: Blue
if (driverAddr==2){
LEDDriver_senddata(0);
LEDDriver_senddata(0);
LEDDriver_senddata(env_out[5][2] & 0xFF);
LEDDriver_senddata((env_out[5][2] >> 8) & 0xFF);
}
//Channel 6 ENVOUT LED: Green
if (driverAddr==3){
LEDDriver_senddata(0);
LEDDriver_senddata(0);
LEDDriver_senddata(env_out[5][1] & 0xFF);
LEDDriver_senddata((env_out[5][1] >> 8) & 0xFF);
}
LEDDriver_endxfer();
}
driverAddr=4;
LEDDriver_startxfer(driverAddr);
LEDDriver_senddata(PCA9685_LED0);
for (i=0;i<5;i++){
LEDDriver_senddata(0); //on-time = 0
LEDDriver_senddata(0);
LEDDriver_senddata(env_out[i][0] & 0xFF); //off-time = brightness
LEDDriver_senddata((env_out[i][0] >> 8) & 0xFF);
LEDDriver_senddata(0); //on-time = 0
LEDDriver_senddata(0);
LEDDriver_senddata(env_out[i][1] & 0xFF); //off-time = brightness
LEDDriver_senddata((env_out[i][1] >> 8) & 0xFF);
LEDDriver_senddata(0); //on-time = 0
LEDDriver_senddata(0);
LEDDriver_senddata(env_out[i][2] & 0xFF); //off-time = brightness
LEDDriver_senddata((env_out[i][2] >> 8) & 0xFF);
}
//Channel 6 ENVOUT LED: Red
LEDDriver_senddata(0); //on-time = 0
LEDDriver_senddata(0);
LEDDriver_senddata(env_out[5][0] & 0xFF); //off-time = brightness
LEDDriver_senddata((env_out[5][0] >> 8) & 0xFF);
LEDDriver_endxfer();
}
void LEDDriver_set_one_LED(uint8_t element_number, uint16_t brightness){ //sets one LED element
uint8_t driverAddr;
//element_number is 0..(NUM_LEDS*3-1) or 0..77
//Treat each driver as if it has 15 elements. The 16th element for drivers 2, 3, and 4 is for LED elements 75, 76, and 77 respectively.
if (element_number<=74){
driverAddr = (element_number/15);
element_number = element_number - (driverAddr * 15);
} else {
driverAddr = element_number - 73;
element_number = 15;
}
LEDDriver_startxfer(driverAddr); //20us
LEDDriver_senddata(PCA9685_LED0 + (element_number*4)); //4 registers per LED element
LEDDriver_senddata(0); //on-time = 0
LEDDriver_senddata(0);
LEDDriver_senddata(brightness & 0xFF); //off-time = brightness
LEDDriver_senddata(brightness >> 8);
LEDDriver_endxfer();
}
void LEDDriver_setRGBLED(uint8_t led_number, uint32_t rgb){ //sets one RGB LED with a 10+10+10 bit color value
uint8_t driverAddr;
uint16_t c_red= (rgb >> 20) & 0b1111111111;
uint16_t c_green= (rgb >> 10) & 0b1111111111;
uint16_t c_blue= rgb & 0b1111111111;
if (led_number >=0 && led_number <= 24) {
driverAddr = (led_number/5);
led_number = led_number - (driverAddr * 5);
LEDDriver_startxfer(driverAddr); //20us
LEDDriver_senddata(PCA9685_LED0 + (led_number*12)); //12 registers per LED (4 registers per LED element) = 12*16 registers per driver
LEDDriver_senddata(0); //on-time = 0
LEDDriver_senddata(0);
LEDDriver_senddata(c_red & 0xFF); //off-time = brightness
LEDDriver_senddata(c_red >> 8);
LEDDriver_senddata(0); //on-time = 0 //four senddata commands take 140us
LEDDriver_senddata(0);
LEDDriver_senddata(c_green & 0xFF); //off-time = brightness
LEDDriver_senddata(c_green >> 8);
LEDDriver_senddata(0); //on-time = 0
LEDDriver_senddata(0);
LEDDriver_senddata(c_blue & 0xFF); //off-time = brightness
LEDDriver_senddata(c_blue >> 8);
LEDDriver_endxfer();
} else if (led_number==25){
driverAddr = 2;
LEDDriver_startxfer(driverAddr); //20us
LEDDriver_senddata(PCA9685_LED0 + 4*15); //PCA9685_LED15
LEDDriver_senddata(0); //on-time = 0
LEDDriver_senddata(0);
LEDDriver_senddata(c_blue & 0xFF); //off-time = brightness
LEDDriver_senddata(c_blue >> 8);
LEDDriver_endxfer();
driverAddr = 3;
LEDDriver_startxfer(driverAddr); //20us
LEDDriver_senddata(PCA9685_LED0 + 4*15);
LEDDriver_senddata(0); //on-time = 0 //four senddata commands take 140us
LEDDriver_senddata(0);
LEDDriver_senddata(c_green & 0xFF); //off-time = brightness
LEDDriver_senddata(c_green >> 8);
LEDDriver_endxfer();
driverAddr = 4;
LEDDriver_startxfer(driverAddr); //20us
LEDDriver_senddata(PCA9685_LED0 + 4*15);
LEDDriver_senddata(0); //on-time = 0
LEDDriver_senddata(0);
LEDDriver_senddata(c_red & 0xFF); //off-time = brightness
LEDDriver_senddata(c_red >> 8);
LEDDriver_endxfer();
}
}
void LEDDriver_Reset(uint8_t driverAddr){
LEDDriver_writeregister(driverAddr, PCA9685_MODE1, 0b00000000); // clear sleep mode
delay(20);
//LEDDriver_writeregister(driverAddr, PCA9685_MODE1, 0b10100000); // set up for auto increment
LEDDriver_writeregister(driverAddr, PCA9685_MODE1, 0b10000000); //start reset mode
delay(20);
LEDDriver_writeregister(driverAddr, PCA9685_MODE1, 0b00100000); //auto increment
LEDDriver_writeregister(driverAddr, PCA9685_MODE2, 0b00010001); // INVERT=1, OUTDRV=0, OUTNE=01
}
void LEDDriver_Init(uint8_t numdrivers){
uint8_t i;
LEDDriver_GPIO_Init();
LEDDriver_I2C_Init();
for (i=0;i<numdrivers;i++){
LEDDriver_Reset(i);
}
}