244 lines
7.3 KiB
C
244 lines
7.3 KiB
C
#ifdef ISSI_ENABLE
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#include <stdlib.h>
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#include <stdint.h>
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#include <util/delay.h>
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#include <avr/sfr_defs.h>
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#include <avr/io.h>
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#include <util/twi.h>
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#include "issi.h"
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#include "print.h"
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#include "TWIlib.h"
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#define ISSI_ADDR_DEFAULT 0xE8
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#define ISSI_REG_CONFIG 0x00
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#define ISSI_REG_CONFIG_PICTUREMODE 0x00
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#define ISSI_REG_CONFIG_AUTOPLAYMODE 0x08
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#define ISSI_CONF_PICTUREMODE 0x00
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#define ISSI_CONF_AUTOFRAMEMODE 0x04
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#define ISSI_CONF_AUDIOMODE 0x08
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#define ISSI_REG_PICTUREFRAME 0x01
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#define ISSI_REG_SHUTDOWN 0x0A
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#define ISSI_REG_AUDIOSYNC 0x06
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#define ISSI_COMMANDREGISTER 0xFD
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#define ISSI_BANK_FUNCTIONREG 0x0B // helpfully called 'page nine'
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uint8_t control[8][9] = {
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{0, 0, 0, 0, 0, 0, 0, 0, 0}, {0, 0, 0, 0, 0, 0, 0, 0, 0},
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{0, 0, 0, 0, 0, 0, 0, 0, 0}, {0, 0, 0, 0, 0, 0, 0, 0, 0},
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{0, 0, 0, 0, 0, 0, 0, 0, 0}, {0, 0, 0, 0, 0, 0, 0, 0, 0},
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{0, 0, 0, 0, 0, 0, 0, 0, 0}, {0, 0, 0, 0, 0, 0, 0, 0, 0},
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};
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ISSIDeviceStruct *issi_devices[4] = {0, 0, 0, 0};
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#ifndef cbi
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#define cbi(sfr, bit) (_SFR_BYTE(sfr) &= ~_BV(bit))
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#endif
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#ifndef sbi
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#define sbi(sfr, bit) (_SFR_BYTE(sfr) |= _BV(bit))
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#endif
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#define I2C_WRITE 0
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#define F_SCL 400000UL // SCL frequency
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#define Prescaler 1
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#define TWBR_val ((((F_CPU / F_SCL) / Prescaler) - 16 ) / 2)
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uint8_t i2c_start(uint8_t address)
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{
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// reset TWI control register
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TWCR = 0;
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// transmit START condition
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TWCR = (1<<TWINT) | (1<<TWSTA) | (1<<TWEN);
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// wait for end of transmission
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while( !(TWCR & (1<<TWINT)) );
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// check if the start condition was successfully transmitted
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if((TWSR & 0xF8) != TW_START){ return 1; }
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// load slave address into data register
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TWDR = address;
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// start transmission of address
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TWCR = (1<<TWINT) | (1<<TWEN);
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// wait for end of transmission
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while( !(TWCR & (1<<TWINT)) );
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// check if the device has acknowledged the READ / WRITE mode
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uint8_t twst = TW_STATUS & 0xF8;
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if ( (twst != TW_MT_SLA_ACK) && (twst != TW_MR_SLA_ACK) ) return 1;
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return 0;
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}
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uint8_t i2c_write(uint8_t data)
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{
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// load data into data register
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TWDR = data;
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// start transmission of data
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TWCR = (1 << TWINT) | (1 << TWEN);
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// wait for end of transmission
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while (!(TWCR & (1 << TWINT)))
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;
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if ((TWSR & 0xF8) != TW_MT_DATA_ACK) {
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return 1;
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}
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return 0;
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}
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uint8_t i2c_transmit(uint8_t address, uint8_t* data, uint16_t length)
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{
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TWBR = (uint8_t)TWBR_val;
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if (i2c_start(address | I2C_WRITE))
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return 1;
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for (uint16_t i = 0; i < length; i++) {
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if (i2c_write(data[i]))
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return 1;
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}
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// transmit STOP condition
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TWCR = (1 << TWINT) | (1 << TWEN) | (1 << TWSTO);
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return 0;
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}
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void setFrame(uint8_t device, uint8_t frame)
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{
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static uint8_t current_frame = -1;
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if(current_frame != frame){
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uint8_t payload[] = {
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ISSI_ADDR_DEFAULT | device << 1,
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ISSI_COMMANDREGISTER,
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frame
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};
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TWITransmitData(payload, sizeof(payload), 0, 1);
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}
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// static uint8_t current_frame = 0xFF;
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// if(current_frame == frame){
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// // return;
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// }
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// uint8_t payload[2] = { ISSI_COMMANDREGISTER, frame };
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// i2c_transmit(ISSI_ADDR_DEFAULT | device << 1, payload, 2);
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// current_frame = frame;
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}
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void writeRegister8(uint8_t device, uint8_t frame, uint8_t reg, uint8_t data)
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{
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// Set the frame
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setFrame(device, frame);
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// Write to the register
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uint8_t payload[] = {
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ISSI_ADDR_DEFAULT | device << 1,
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reg,
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data
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};
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TWITransmitData(payload, sizeof(payload), 0, 1);
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}
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void activateLED(uint8_t matrix, uint8_t cx, uint8_t cy, uint8_t pwm)
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{
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uint8_t device_addr = (matrix & 0x06) >> 1;
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ISSIDeviceStruct *device = issi_devices[device_addr];
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if(device == 0){
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return;
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}
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// xprintf("activeLED: %02X %02X %02X %02X\n", matrix, cy, cx, pwm);
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uint8_t x = cx - 1; // funciton takes 1 based counts, but we need 0...
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uint8_t y = cy - 1; // creating them once for less confusion
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uint8_t control_reg = (y << 1) | (matrix & 0x01);
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if(pwm == 0){
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cbi(device->led_ctrl[control_reg], x);
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cbi(device->led_blink_ctrl[control_reg], x);
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}else{
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sbi(device->led_ctrl[control_reg], x);
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sbi(device->led_blink_ctrl[control_reg], x);
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}
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uint8_t pwm_reg = 0;
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switch(matrix & 0x01){
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case 0:
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pwm_reg = 0x00;
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break;
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case 1:
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pwm_reg = 0x08;
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break;
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}
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pwm_reg += (y << 4) + x;
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device->led_pwm[pwm_reg] = pwm;
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device->led_dirty = 1;
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}
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void update_issi(uint8_t device_addr, uint8_t blocking)
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{
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// This seems to take about 6ms
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ISSIDeviceStruct *device = issi_devices[device_addr];
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if(device != 0){
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if(device->fn_dirty){
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device->fn_dirty = 0;
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setFrame(device_addr, ISSI_BANK_FUNCTIONREG);
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TWITransmitData(&device->fn_device_addr, sizeof(device->fn_registers) + 2, 0, 1);
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}
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if(device->led_dirty){
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device->led_dirty = 0;
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setFrame(device_addr, 0);
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TWITransmitData(&device->led_device_addr, 0xB6, 0, blocking);
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}
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}
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}
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void issi_init(void)
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{
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TWIInit();
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for(uint8_t device_addr = 0; device_addr < 4; device_addr++){
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// If this device has been previously allocated, free it
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if(issi_devices[device_addr] != 0){
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free(issi_devices[device_addr]);
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}
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// Try to shutdown the device, if this fails skip this device
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writeRegister8(device_addr, ISSI_BANK_FUNCTIONREG, ISSI_REG_SHUTDOWN, 0x00);
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while (!isTWIReady()){_delay_us(1);}
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if(TWIInfo.errorCode != 0xFF){
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xprintf("ISSI init failed %d %02X %02X\n", device_addr, TWIInfo.mode, TWIInfo.errorCode);
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continue;
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}
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// Allocate the device structure - calloc zeros it for us
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ISSIDeviceStruct *device = (ISSIDeviceStruct *)calloc(sizeof(ISSIDeviceStruct) * 2, 1);
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issi_devices[device_addr] = device;
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device->fn_device_addr = ISSI_ADDR_DEFAULT | device_addr << 1;
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device->fn_register_addr = 0;
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device->led_device_addr = ISSI_ADDR_DEFAULT | device_addr << 1;
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device->led_register_addr = 0;
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// set dirty bits so that all of the buffered data is written out
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device->fn_dirty = 1;
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device->led_dirty = 1;
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update_issi(device_addr, 1);
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// Set the function register to picture mode
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// device->fn_reg[ISSI_REG_CONFIG] = ISSI_REG_CONFIG_PICTUREMODE;
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writeRegister8(device_addr, ISSI_BANK_FUNCTIONREG, ISSI_REG_SHUTDOWN, 0x01);
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}
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// Shutdown and set all registers to 0
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// writeRegister8(device_addr, ISSI_BANK_FUNCTIONREG, ISSI_REG_SHUTDOWN, 0x00);
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// for(uint8_t bank = 0; bank <= 7; bank++){
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// for (uint8_t reg = 0x00; reg <= 0xB3; reg++) {
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// writeRegister8(device_addr, bank, reg, 0x00);
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// }
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// }
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// for (uint8_t reg = 0; reg <= 0x0C; reg++) {
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// writeRegister8(device_addr, ISSI_BANK_FUNCTIONREG, reg, 0x00);
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// }
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// writeRegister8(device_addr, ISSI_BANK_FUNCTIONREG, ISSI_REG_CONFIG, ISSI_REG_CONFIG_PICTUREMODE);
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// writeRegister8(device_addr, ISSI_BANK_FUNCTIONREG, ISSI_REG_SHUTDOWN, 0x01);
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// picture mode
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// writeRegister8(ISSI_BANK_FUNCTIONREG, 0x01, 0x01);
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//Enable blink
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// writeRegister8(ISSI_BANK_FUNCTIONREG, 0x05, 0x48B);
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//Enable Breath
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}
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#endif |