altos: Use new ao_spi_speed inline to set SPI speeds using spec'd frequencies

[fw/altos] / src / stmf0 / ao_arch_funcs.h

diff --git a/src/stmf0/ao_arch_funcs.h b/src/stmf0/ao_arch_funcs.h
index 190f9d1766ea7dbd96f1b95c9a2b6ac52c7f3061..defe259896e67b4eaf0f78ae0be48808dddcbede 100644 (file)
--- a/src/stmf0/ao_arch_funcs.h
+++ b/src/stmf0/ao_arch_funcs.h
@@ -26,20 +26,27 @@
 
 /* PCLK is set to 48MHz (HCLK 48MHz, HPRE 1, PPRE 1) */
 
-#define AO_SPI_SPEED_24MHz     STM_SPI_CR1_BR_PCLK_2
-#define AO_SPI_SPEED_12MHz     STM_SPI_CR1_BR_PCLK_4
-#define AO_SPI_SPEED_6MHz      STM_SPI_CR1_BR_PCLK_8
-#define AO_SPI_SPEED_3MHz      STM_SPI_CR1_BR_PCLK_16
-#define AO_SPI_SPEED_1500kHz   STM_SPI_CR1_BR_PCLK_32
-#define AO_SPI_SPEED_750kHz    STM_SPI_CR1_BR_PCLK_64
-#define AO_SPI_SPEED_375kHz    STM_SPI_CR1_BR_PCLK_128
-#define AO_SPI_SPEED_187500Hz  STM_SPI_CR1_BR_PCLK_256
+#define _AO_SPI_SPEED_24MHz    STM_SPI_CR1_BR_PCLK_2
+#define _AO_SPI_SPEED_12MHz    STM_SPI_CR1_BR_PCLK_4
+#define _AO_SPI_SPEED_6MHz     STM_SPI_CR1_BR_PCLK_8
+#define _AO_SPI_SPEED_3MHz     STM_SPI_CR1_BR_PCLK_16
+#define _AO_SPI_SPEED_1500kHz  STM_SPI_CR1_BR_PCLK_32
+#define _AO_SPI_SPEED_750kHz   STM_SPI_CR1_BR_PCLK_64
+#define _AO_SPI_SPEED_375kHz   STM_SPI_CR1_BR_PCLK_128
+#define _AO_SPI_SPEED_187500Hz STM_SPI_CR1_BR_PCLK_256
 
-#define AO_SPI_SPEED_FAST      AO_SPI_SPEED_24MHz
-
-/* Companion bus wants something no faster than 200kHz */
-
-#define AO_SPI_SPEED_200kHz    AO_SPI_SPEED_187500Hz
+static inline uint32_t
+ao_spi_speed(uint32_t hz)
+{
+       if (hz >=24000000) return _AO_SPI_SPEED_24MHz;
+       if (hz >=12000000) return _AO_SPI_SPEED_12MHz;
+       if (hz >= 6000000) return _AO_SPI_SPEED_6MHz;
+       if (hz >= 3000000) return _AO_SPI_SPEED_3MHz;
+       if (hz >= 1500000) return _AO_SPI_SPEED_1500kHz;
+       if (hz >=  750000) return _AO_SPI_SPEED_750kHz;
+       if (hz >=  375000) return _AO_SPI_SPEED_375kHz;
+       return _AO_SPI_SPEED_187500Hz;
+}
 
 #define AO_SPI_CONFIG_1                0x00
 #define AO_SPI_1_CONFIG_PA5_PA6_PA7    AO_SPI_CONFIG_1
@@ -141,8 +148,6 @@ ao_spi_recv(void *block, uint16_t len, uint8_t spi_index);
 void
 ao_spi_duplex(void *out, void *in, uint16_t len, uint8_t spi_index);
 
-extern uint16_t        ao_spi_speed[STM_NUM_SPI];
-
 void
 ao_spi_init(void);