2 * Copyright © 2012 Keith Packard <keithp@keithp.com>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
21 #include <ao_ms5607.h>
23 #if HAS_MS5607 || HAS_MS5611
25 struct ao_ms5607_prom ao_ms5607_prom;
26 static uint8_t ms5607_configured;
28 #define AO_MS5607_SPI_SPEED ao_spi_speed(20000000)
31 ao_ms5607_start(void) {
32 ao_spi_get_bit(AO_MS5607_CS_PORT, AO_MS5607_CS_PIN, AO_MS5607_SPI_INDEX, AO_MS5607_SPI_SPEED);
36 ao_ms5607_stop(void) {
37 ao_spi_put_bit(AO_MS5607_CS_PORT, AO_MS5607_CS_PIN, AO_MS5607_SPI_INDEX);
41 ao_ms5607_reset(void) {
44 cmd = AO_MS5607_RESET;
46 ao_spi_send(&cmd, 1, AO_MS5607_SPI_INDEX);
47 ao_delay(AO_MS_TO_TICKS(10));
52 ao_ms5607_crc(uint8_t *prom)
54 uint8_t crc_byte = prom[15];
61 for (cnt = 0; cnt < 16; cnt++) {
63 for (n_bit = 8; n_bit > 0; n_bit--) {
65 n_rem = (n_rem << 1) ^ 0x3000;
70 n_rem = (n_rem >> 12) & 0xf;
76 ao_ms5607_prom_valid(uint8_t *prom)
82 /* Look for a value other than 0x0000 or 0xffff */
84 for (i = 0; i < 16; i++)
90 crc = ao_ms5607_crc(prom);
91 if (crc != (prom[15] & 0xf))
98 ao_ms5607_prom_read(struct ao_ms5607_prom *prom)
103 r = (uint16_t *) prom;
104 for (addr = 0; addr < 8; addr++) {
105 uint8_t cmd = AO_MS5607_PROM_READ(addr);
107 ao_spi_send(&cmd, 1, AO_MS5607_SPI_INDEX);
108 ao_spi_recv(r, 2, AO_MS5607_SPI_INDEX);
114 if (!ao_ms5607_prom_valid((uint8_t *) prom)) {
115 #if HAS_SENSOR_ERRORS
116 AO_SENSOR_ERROR(AO_DATA_MS5607);
118 ao_panic(AO_PANIC_SELF_TEST_MS5607);
122 #if __BYTE_ORDER == __LITTLE_ENDIAN
124 r = (uint16_t *) prom;
125 for (addr = 0; addr < 8; addr++) {
126 uint8_t *t = (uint8_t *) r;
136 ao_ms5607_setup(void)
138 if (ms5607_configured)
140 ms5607_configured = 1;
142 ao_ms5607_prom_read(&ao_ms5607_prom);
145 static volatile uint8_t ao_ms5607_done;
150 ao_exti_disable(AO_MS5607_MISO_PORT, AO_MS5607_MISO_PIN);
152 ao_wakeup((void *) &ao_ms5607_done);
156 ao_ms5607_get_sample(uint8_t cmd) {
163 ao_spi_send(&cmd, 1, AO_MS5607_SPI_INDEX);
165 ao_exti_enable(AO_MS5607_MISO_PORT, AO_MS5607_MISO_PIN);
167 #if AO_MS5607_PRIVATE_PINS
168 ao_spi_put(AO_MS5607_SPI_INDEX);
170 ao_arch_block_interrupts();
171 while (!ao_gpio_get(AO_MS5607_MISO_PORT, AO_MS5607_MISO_PIN) &&
173 ao_sleep((void *) &ao_ms5607_done);
174 ao_arch_release_interrupts();
175 #if AO_MS5607_PRIVATE_PINS
176 stm_gpio_set(AO_MS5607_CS_PORT, AO_MS5607_CS_PIN, 1);
182 read = AO_MS5607_ADC_READ;
183 ao_spi_send(&read, 1, AO_MS5607_SPI_INDEX);
184 ao_spi_recv(&reply, 3, AO_MS5607_SPI_INDEX);
187 return ((uint32_t) reply[0] << 16) | ((uint32_t) reply[1] << 8) | (uint32_t) reply[2];
190 #ifndef AO_MS5607_BARO_OVERSAMPLE
191 #define AO_MS5607_BARO_OVERSAMPLE 2048
194 #ifndef AO_MS5607_TEMP_OVERSAMPLE
195 #define AO_MS5607_TEMP_OVERSAMPLE AO_MS5607_BARO_OVERSAMPLE
198 #define token_paster(x,y) x ## y
199 #define token_evaluator(x,y) token_paster(x,y)
201 #define AO_CONVERT_D1 token_evaluator(AO_MS5607_CONVERT_D1_, AO_MS5607_BARO_OVERSAMPLE)
202 #define AO_CONVERT_D2 token_evaluator(AO_MS5607_CONVERT_D2_, AO_MS5607_TEMP_OVERSAMPLE)
205 ao_ms5607_sample(struct ao_ms5607_sample *sample)
207 sample->pres = ao_ms5607_get_sample(AO_CONVERT_D1);
208 sample->temp = ao_ms5607_get_sample(AO_CONVERT_D2);
212 #include "ao_ms5607_convert_8051.c"
214 #include "ao_ms5607_convert.c"
217 #ifndef HAS_MS5607_TASK
218 #define HAS_MS5607_TASK HAS_TASK
221 struct ao_ms5607_sample ao_ms5607_current;
227 struct ao_ms5607_sample sample;
231 ao_ms5607_sample(&sample);
232 ao_arch_block_interrupts();
233 ao_ms5607_current = sample;
234 AO_DATA_PRESENT(AO_DATA_MS5607);
236 ao_arch_release_interrupts();
240 struct ao_task ao_ms5607_task;
250 printf ("ms5607 reserved: %u\n", ao_ms5607_prom.reserved);
251 printf ("ms5607 sens: %u\n", ao_ms5607_prom.sens);
252 printf ("ms5607 off: %u\n", ao_ms5607_prom.off);
253 printf ("ms5607 tcs: %u\n", ao_ms5607_prom.tcs);
254 printf ("ms5607 tco: %u\n", ao_ms5607_prom.tco);
255 printf ("ms5607 tref: %u\n", ao_ms5607_prom.tref);
256 printf ("ms5607 tempsens: %u\n", ao_ms5607_prom.tempsens);
257 printf ("ms5607 crc: %u\n", ao_ms5607_prom.crc);
263 struct ao_ms5607_value value;
266 ao_ms5607_sample(&ao_ms5607_current);
268 ao_ms5607_convert(&ao_ms5607_current, &value);
269 printf ("Pressure: %8lu %8ld\n", ao_ms5607_current.pres, value.pres);
270 printf ("Temperature: %8lu %8ld\n", ao_ms5607_current.temp, value.temp);
271 printf ("Altitude: %ld\n", ao_pa_to_altitude(value.pres));
274 const struct ao_cmds ao_ms5607_cmds[] = {
275 { ao_ms5607_dump, "B\0Display MS5607 data" },
278 #endif /* HAS_TASK */
283 ms5607_configured = 0;
284 ao_spi_init_cs(AO_MS5607_CS_PORT, (1 << AO_MS5607_CS_PIN));
287 ao_cmd_register(&ao_ms5607_cmds[0]);
290 ao_add_task(&ao_ms5607_task, ao_ms5607, "ms5607");
293 /* Configure the MISO pin as an interrupt; when the
294 * conversion is complete, the MS5607 will raise this
297 ao_exti_setup(AO_MS5607_MISO_PORT,
300 AO_EXTI_PIN_NOCONFIGURE,