From: Keith Packard <keithp@keithp.com>
Date: Sun, 13 Nov 2022 03:35:26 +0000 (-0800)
Subject: altos/ms5607: Use duplex for fetching data
X-Git-Tag: 1.9.13~1^2~26^2~17
X-Git-Url: https://git.gag.com/?a=commitdiff_plain;h=5c182ab460fef614e2b987c808d4b4e2c4240a4f;p=fw%2Faltos

altos/ms5607: Use duplex for fetching data

Much more efficient than send/recv

Signed-off-by: Keith Packard <keithp@keithp.com>
---

diff --git a/src/drivers/ao_ms5607.c b/src/drivers/ao_ms5607.c
index 46da4e83..1e4cd159 100644
--- a/src/drivers/ao_ms5607.c
+++ b/src/drivers/ao_ms5607.c
@@ -154,8 +154,7 @@ ao_ms5607_isr(void)
 
 static uint32_t
 ao_ms5607_get_sample(uint8_t cmd) {
-	uint8_t	reply[3];
-	uint8_t read;
+	uint8_t	reply[4];
 
 	ao_ms5607_done = 0;
 
@@ -179,12 +178,12 @@ ao_ms5607_get_sample(uint8_t cmd) {
 #endif
 
 	ao_ms5607_start();
-	read = AO_MS5607_ADC_READ;
-	ao_spi_send(&read, 1, AO_MS5607_SPI_INDEX);
-	ao_spi_recv(&reply, 3, AO_MS5607_SPI_INDEX);
+	memset(reply, 0, sizeof(reply));
+	reply[0] = AO_MS5607_ADC_READ;
+	ao_spi_duplex(&reply, &reply, 6, AO_MS5607_SPI_INDEX);
 	ao_ms5607_stop();
 
-	return ((uint32_t) reply[0] << 16) | ((uint32_t) reply[1] << 8) | (uint32_t) reply[2];
+	return ((uint32_t) reply[1] << 16) | ((uint32_t) reply[2] << 8) | (uint32_t) reply[3];
 }
 
 #ifndef AO_MS5607_BARO_OVERSAMPLE