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/*
* Copyright © 2017 Keith Packard <keithp@keithp.com>
*
* 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 2 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.
*/
#include <ao.h>
#include <ao_as1107.h>
static uint8_t as1107_configured;
static uint8_t as1107_mutex;
static void
ao_as1107_start(void) {
ao_spi_get_bit(AO_AS1107_CS_PORT, AO_AS1107_CS_PIN, AO_AS1107_CS, AO_AS1107_SPI_INDEX, AO_AS1107_SPI_SPEED);
}
static void
ao_as1107_stop(void) {
ao_spi_put_bit(AO_AS1107_CS_PORT, AO_AS1107_CS_PIN, AO_AS1107_CS, AO_AS1107_SPI_INDEX);
}
static void
_ao_as1107_cmd(uint8_t addr, uint8_t value)
{
uint8_t packet[2] = { addr, value };
ao_as1107_start();
ao_spi_send(packet, 2, AO_AS1107_SPI_INDEX);
ao_as1107_stop();
}
static void
_ao_as1107_setup(void)
{
if (!as1107_configured) {
as1107_configured = 1;
_ao_as1107_cmd(AO_AS1107_SHUTDOWN, AO_AS1107_SHUTDOWN_SHUTDOWN_RESET);
_ao_as1107_cmd(AO_AS1107_SHUTDOWN, AO_AS1107_SHUTDOWN_SHUTDOWN_NOP);
_ao_as1107_cmd(AO_AS1107_DECODE_MODE, AO_AS1107_DECODE);
_ao_as1107_cmd(AO_AS1107_SCAN_LIMIT, AO_AS1107_NUM_DIGITS - 1);
_ao_as1107_cmd(AO_AS1107_INTENSITY, 0x0f);
_ao_as1107_cmd(AO_AS1107_FEATURE,
(0 << AO_AS1107_FEATURE_CLK_EN) |
(0 << AO_AS1107_FEATURE_REG_RES) |
(1 << AO_AS1107_FEATURE_DECODE_SEL) |
(1 << AO_AS1107_FEATURE_SPI_EN) |
(0 << AO_AS1107_FEATURE_BLINK_EN) |
(0 << AO_AS1107_FEATURE_BLINK_FREQ) |
(0 << AO_AS1107_FEATURE_SYNC) |
(0 << AO_AS1107_FEATURE_BLINK_START));
_ao_as1107_cmd(AO_AS1107_SHUTDOWN, AO_AS1107_SHUTDOWN_NORMAL_NOP);
}
}
void
ao_as1107_write(uint8_t start, uint8_t count, uint8_t *values)
{
uint8_t i;
ao_mutex_get(&as1107_mutex);
_ao_as1107_setup();
for (i = 0; i < count; i++)
{
_ao_as1107_cmd(AO_AS1107_DIGIT(start + i),
values[i]);
}
ao_mutex_put(&as1107_mutex);
}
void
ao_as1107_write_8(uint8_t start, uint8_t value)
{
uint8_t values[2];
values[0] = (value >> 4);
values[1] = value & 0xf;
ao_as1107_write(start, 2, values);
}
void
ao_as1107_write_16(uint8_t start, uint16_t value)
{
uint8_t values[4];
values[0] = (value >> 12);
values[1] = (value >> 8) & 0xf;
values[2] = (value >> 4) & 0xf;
values[3] = (value) & 0xf;
ao_as1107_write(start, 4, values);
}
void
ao_as1107_init(void)
{
as1107_configured = 0;
ao_spi_init_cs(AO_AS1107_CS_PORT, (1 << AO_AS1107_CS_PIN));
}
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