diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/drivers/ao_as1107.c | 102 | ||||
| -rw-r--r-- | src/drivers/ao_as1107.h | 59 |
2 files changed, 161 insertions, 0 deletions
diff --git a/src/drivers/ao_as1107.c b/src/drivers/ao_as1107.c new file mode 100644 index 00000000..0b83ab2c --- /dev/null +++ b/src/drivers/ao_as1107.c @@ -0,0 +1,102 @@ +/* + * 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_DECODE_MODE, AO_AS1107_DECODE); + _ao_as1107_cmd(AO_AS1107_SCAN_LIMIT, AO_AS1107_NUM_DIGITS - 1); + _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)); + } +} + +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)); +} diff --git a/src/drivers/ao_as1107.h b/src/drivers/ao_as1107.h new file mode 100644 index 00000000..a22b17db --- /dev/null +++ b/src/drivers/ao_as1107.h @@ -0,0 +1,59 @@ +/* + * 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. + */ + +#ifndef _AO_AS1107_H_ +#define _AO_AS1107_H_ + +#define AO_AS1107_NO_OP 0x00 +#define AO_AS1107_DIGIT(n) (0x01 + (n)) +#define AO_AS1107_DECODE_MODE 0x09 +#define AO_AS1107_INTENSITY 0x0a +#define AO_AS1107_SCAN_LIMIT 0x0b +#define AO_AS1107_SHUTDOWN 0x0c +#define AO_AS1107_SHUTDOWN_SHUTDOWN_RESET 0x00 +#define AO_AS1107_SHUTDOWN_SHUTDOWN_NOP 0x80 +#define AO_AS1107_SHUTDOWN_NORMAL_RESET 0x01 +#define AO_AS1107_SHUTDOWN_NORMAL_NOP 0x81 + +#define AO_AS1107_FEATURE 0x0e +#define AO_AS1107_FEATURE_CLK_EN 0 /* external clock enable */ +#define AO_AS1107_FEATURE_REG_RES 1 +#define AO_AS1107_FEATURE_DECODE_SEL 2 /* select HEX decode */ +#define AO_AS1107_FEATURE_SPI_EN 3 +#define AO_AS1107_FEATURE_BLINK_EN 4 +#define AO_AS1107_FEATURE_BLINK_FREQ 5 +#define AO_AS1107_FEATURE_SYNC 6 +#define AO_AS1107_FEATURE_BLINK_START 7 +#define AO_AS1107_DISPLAY_TEST 0x0f + +void ao_as1107_init(void); + +void +ao_as1107_write(uint8_t start, uint8_t count, uint8_t *values); + +void +ao_as1107_write_8(uint8_t start, uint8_t value); + +void +ao_as1107_write_16(uint8_t start, uint16_t value); + +#ifndef AO_AS1107_DECODE +#error "must define AO_AS1107_DECODE" +#endif + +#ifndef AO_AS1107_NUM_DIGITS +#error "must define AO_AS1107_NUM_DIGITS" +#endif + +#endif /* _AO_AS1107_H_ */ |