140 lines
2.6 KiB
C
140 lines
2.6 KiB
C
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/*
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* ----------------------------------------------------------------------------
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* "THE BEER-WARE LICENSE" (Revision 42):
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* <struppi@struppi.name> wrote this file. As long as you retain this notice you
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* can do whatever you want with this stuff. If we meet some day, and you think
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* this stuff is worth it, you can buy me a beer in return.
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* (c) 2014 Stefan Rupp
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* ----------------------------------------------------------------------------
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*/
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#include <string.h>
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#include "led1642gw.h"
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#include <util/delay.h>
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#include "led1642gw_config.h"
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#define NUM_LED1642GW_CHANNELS (16)
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#define NUM_LED_CHANNELS (NUM_LED1642GW_CHANNELS*NUM_LED1642GW_ICs)
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static uint16_t ledbuffer[NUM_LED_CHANNELS];
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static void write_data(uint16_t data, uint8_t le_clocks)
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{
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uint16_t mask = 0x8000;
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int8_t bit;
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SET_LE_L();
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for (bit=15; bit>=le_clocks; bit--) {
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SET_CLK_L();
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if(data&mask) { SET_SDI_H(); }
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else { SET_SDI_L(); }
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SET_CLK_H();
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mask >>= 1;
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}
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SET_LE_H();
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for (/*noting to initialize*/; bit>=0; bit--) {
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SET_CLK_L();
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if(data&mask) { SET_SDI_H(); }
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else { SET_SDI_L(); }
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SET_CLK_H();
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mask >>= 1;
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}
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SET_CLK_L();
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SET_LE_L();
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SET_SDI_L();
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}
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static void write_data_latch(uint16_t data)
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{
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write_data(data, 4);
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}
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static void write_global_latch(uint16_t data)
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{
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write_data(data, 6);
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}
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static void write_no_command(uint16_t data)
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{
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write_data(data, 0);
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}
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void led1642gw_turn_all_on(void)
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{
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write_data(0xffff, 2);
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_delay_us(10);
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write_data(0xffff, 2);
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_delay_us(10);
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write_data(0xffff, 2);
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_delay_us(10);
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}
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void led1642gw_turn_all_off(void)
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{
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write_data(0x0000, 2);
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_delay_us(10);
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write_data(0x0000, 2);
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_delay_us(10);
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write_data(0x0000, 2);
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_delay_us(10);
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}
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void led1642gw_init(void)
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{
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SET_CLK_L();
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SET_SDI_L();
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SET_LE_L();
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DDR_CLK |= (1<<PIN_CLK);
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DDR_SDI |= (1<<PIN_SDI);
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DDR_LE |= (1<<PIN_LE);
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memset(ledbuffer, 0x00, sizeof(ledbuffer));
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led1642gw_flush();
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}
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void led1642gw_flush(void)
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{
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uint8_t channel;
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uint8_t ic;
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for (channel=0; channel<NUM_LED1642GW_CHANNELS-1; channel++) {
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for (ic=0; ic<(NUM_LED1642GW_ICs-1); ic++) {
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write_no_command(ledbuffer[channel+(NUM_LED1642GW_CHANNELS*ic)]);
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}
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write_data_latch(ledbuffer[channel+(ic*NUM_LED1642GW_CHANNELS)]);
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}
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for (ic=1; ic<NUM_LED1642GW_ICs; ic++) {
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write_no_command(ledbuffer[(ic*NUM_LED1642GW_CHANNELS)-1]);
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}
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write_global_latch(ledbuffer[(ic*NUM_LED1642GW_CHANNELS)-1]);
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}
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void led1642gw_set_channel(uint8_t channel, uint16_t value)
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{
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if (channel < NUM_LED_CHANNELS) {
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ledbuffer[channel] = value;
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}
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}
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void led1642gw_clear(void)
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{
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memset(ledbuffer, 0x00, sizeof(ledbuffer));
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}
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