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authorThomas Otto2010-03-30 22:29:02 +0200
committerThomas Otto2010-03-30 22:29:02 +0200
commit47c51fc9cc26b4bbd581ea76737c338ea1477cc0 (patch)
treec4da04b55f4fd654ee8941da474b9472e237cb0f
parente50b836ada3110bdcb940b75624fdad47edc3056 (diff)
Some additions to spi.c+h.
-rw-r--r--include/libopenstm32/spi.h75
-rw-r--r--lib/spi.c195
2 files changed, 268 insertions, 2 deletions
diff --git a/include/libopenstm32/spi.h b/include/libopenstm32/spi.h
index 3090299..bd37f75 100644
--- a/include/libopenstm32/spi.h
+++ b/include/libopenstm32/spi.h
@@ -97,6 +97,7 @@
/* BIDIMODE: Bidirectional data mode enable */
#define SPI_CR1_BIDIMODE_2LINE_UNIDIR (0 << 15)
#define SPI_CR1_BIDIMODE_1LINE_BIDIR (1 << 15)
+#define SPI_CR1_BIDIMODE (1 << 15)
/* BIDIOE: Output enable in bidirectional mode */
#define SPI_CR1_BIDIOE (1 << 14)
@@ -110,6 +111,7 @@
/* DFF: Data frame format */
#define SPI_CR1_DFF_8BIT (0 << 11)
#define SPI_CR1_DFF_16BIT (1 << 11)
+#define SPI_CR1_DFF (1 << 11)
/* RXONLY: Receive only */
#define SPI_CR1_RXONLY (1 << 10)
@@ -136,6 +138,14 @@
#define SPI_CR1_BAUDRATE_FPCLK_DIV_64 (0x05 << 3)
#define SPI_CR1_BAUDRATE_FPCLK_DIV_128 (0x06 << 3)
#define SPI_CR1_BAUDRATE_FPCLK_DIV_256 (0x07 << 3)
+#define SPI_CR1_BR_FPCLK_DIV_2 0x0
+#define SPI_CR1_BR_FPCLK_DIV_4 0x1
+#define SPI_CR1_BR_FPCLK_DIV_8 0x2
+#define SPI_CR1_BR_FPCLK_DIV_16 0x3
+#define SPI_CR1_BR_FPCLK_DIV_32 0x4
+#define SPI_CR1_BR_FPCLK_DIV_64 0x5
+#define SPI_CR1_BR_FPCLK_DIV_128 0x6
+#define SPI_CR1_BR_FPCLK_DIV_256 0x7
/* MSTR: Master selection */
#define SPI_CR1_MSTR (1 << 2)
@@ -143,10 +153,36 @@
/* CPOL: Clock polarity */
#define SPI_CR1_CPOL_CLK_TO_0_WHEN_IDLE (0 << 1)
#define SPI_CR1_CPOL_CLK_TO_1_WHEN_IDLE (1 << 1)
+#define SPI_CR1_CPOL (1 << 1)
/* CPHA: Clock phase */
#define SPI_CR1_CPHA_CLK_TRANSITION_1 (0 << 0)
#define SPI_CR1_CPHA_CLK_TRANSITION_2 (1 << 0)
+#define SPI_CR1_CPHA (1 << 0)
+
+/* --- SPI_CR1 values ------------------------------------------------------ */
+
+/* Bits [15:8]: Reserved. Forced to 0 by hardware. */
+
+/* TXEIE: Tx buffer empty interrupt enable */
+#define SPI_CR2_TXEIE (1 << 7)
+
+/* RXNEIE: RX buffer not empty interrupt enable */
+#define SPI_CR2_RXNEIE (1 << 6)
+
+/* ERRIE: Error interrupt enable */
+#define SPI_CR2_ERRIE (1 << 5)
+
+/* Bits [4:3]: Reserved. Forced to 0 by hardware. */
+
+/* SSOE: SS output enable */
+#define SPI_CR2_SSOE (1 << 2)
+
+/* TXDMAEN: Tx buffer DMA enable */
+#define SPI_CR2_TXDMAEN (1 << 1)
+
+/* RXDMAEN: Rx buffer DMA enable */
+#define SPI_CR2_RXDMAEN (1 << 0)
/* --- Function prototypes ------------------------------------------------- */
@@ -155,7 +191,42 @@ void spi_enable(u32 spi);
void spi_disable(u32 spi);
void spi_write(u32 spi, u16 data);
u16 spi_read(u32 spi);
-
-/* TODO */
+void spi_set_bidirectional_mode(u32 spi);
+void spi_set_unidirectional_mode(u32 spi);
+void spi_set_bidirectional_receive_only_mode(u32 spi);
+void spi_set_bidirectional_transmit_only_mode(u32 spi);
+void spi_enable_crc(u32 spi);
+void spi_disable_crc(u32 spi);
+void spi_set_next_tx_from_buffer(u32 spi);
+void spi_set_next_tx_from_crc(u32 spi);
+void spi_set_dff_8bit(u32 spi);
+void spi_set_dff_16bit(u32 spi);
+void spi_set_full_duplex_mode(u32 spi);
+void spi_set_receive_only_mode(u32 spi);
+void spi_disable_software_slave_management(u32 spi);
+void spi_enable_software_slave_management(u32 spi);
+void spi_set_nss_high(u32 spi);
+void spi_set_nss_low(u32 spi);
+void spi_send_lsb_first(u32 spi);
+void spi_send_msb_first(u32 spi);
+void spi_set_baudrate_prescaler(u32 spi, u8 baudrate);
+void spi_set_master_mode(u32 spi);
+void spi_set_slave_mode(u32 spi);
+void spi_set_clock_polarity_1(u32 spi);
+void spi_set_clock_polarity_0(u32 spi);
+void spi_set_clock_phase_1(u32 spi);
+void spi_set_clock_phase_0(u32 spi);
+void spi_enable_tx_buffer_empty_interrupt(u32 spi);
+void spi_disable_tx_buffer_empty_interrupt(u32 spi);
+void spi_enable_rx_buffer_not_empty_interrupt(u32 spi);
+void spi_disable_rx_buffer_not_empty_interrupt(u32 spi);
+void spi_enable_error_interrupt(u32 spi);
+void spi_disable_error_interrupt(u32 spi);
+void spi_enable_ss_output(u32 spi);
+void spi_disable_ss_output(u32 spi);
+void spi_enable_tx_dma(u32 spi);
+void spi_disable_tx_dma(u32 spi);
+void spi_enable_rx_dma(u32 spi);
+void spi_disable_rx_dma(u32 spi);
#endif
diff --git a/lib/spi.c b/lib/spi.c
index 0e93ec3..757e5a8 100644
--- a/lib/spi.c
+++ b/lib/spi.c
@@ -83,3 +83,198 @@ u16 spi_read(u32 spi)
/* Read the data (8 or 16 bits, depending on DFF bit) from DR. */
return SPI_DR(spi);
}
+
+void spi_set_bidirectional_mode(u32 spi)
+{
+ SPI_CR1(spi) |= SPI_CR1_BIDIMODE;
+}
+
+void spi_set_unidirectional_mode(u32 spi)
+{
+ SPI_CR1(spi) &= ~SPI_CR1_BIDIMODE;
+}
+
+void spi_set_bidirectional_receive_only_mode(u32 spi)
+{
+ SPI_CR1(spi) |= SPI_CR1_BIDIMODE;
+ SPI_CR1(spi) &= ~SPI_CR1_BIDIOE;
+}
+
+void spi_set_bidirectional_transmit_only_mode(u32 spi)
+{
+ SPI_CR1(spi) |= SPI_CR1_BIDIMODE;
+ SPI_CR1(spi) |= SPI_CR1_BIDIOE;
+}
+
+void spi_enable_crc(u32 spi)
+{
+ SPI_CR1(spi) |= SPI_CR1_CRCEN;
+}
+
+void spi_disable_crc(u32 spi)
+{
+ SPI_CR1(spi) &= ~SPI_CR1_CRCEN;
+}
+
+void spi_set_next_tx_from_buffer(u32 spi)
+{
+ SPI_CR1(spi) &= ~SPI_CR1_CRCNEXT;
+}
+
+void spi_set_next_tx_from_crc(u32 spi)
+{
+ SPI_CR1(spi) |= SPI_CR1_CRCNEXT;
+}
+
+void spi_set_dff_8bit(u32 spi)
+{
+ SPI_CR1(spi) &= ~SPI_CR1_DFF;
+}
+
+void spi_set_dff_16bit(u32 spi)
+{
+ SPI_CR1(spi) |= SPI_CR1_DFF;
+}
+
+void spi_set_full_duplex_mode(u32 spi)
+{
+ SPI_CR1(spi) &= ~SPI_CR1_RXONLY;
+}
+
+void spi_set_receive_only_mode(u32 spi)
+{
+ SPI_CR1(spi) |= SPI_CR1_RXONLY;
+}
+
+void spi_disable_software_slave_management(u32 spi)
+{
+ SPI_CR1(spi) &= ~SPI_CR1_SSM;
+}
+
+void spi_enable_software_slave_management(u32 spi)
+{
+ SPI_CR1(spi) |= SPI_CR1_SSM;
+}
+
+void spi_set_nss_high(u32 spi)
+{
+ SPI_CR1(spi) |= SPI_CR1_SSI;
+}
+
+void spi_set_nss_low(u32 spi)
+{
+ SPI_CR1(spi) &= ~SPI_CR1_SSI;
+}
+
+void spi_send_lsb_first(u32 spi)
+{
+ SPI_CR1(spi) |= SPI_CR1_LSBFIRST;
+}
+
+void spi_send_msb_first(u32 spi)
+{
+ SPI_CR1(spi) &= ~SPI_CR1_LSBFIRST;
+}
+
+void spi_set_baudrate_prescaler(u32 spi, u8 baudrate)
+{
+ u32 reg32;
+
+ if (baudrate > 7)
+ return;
+
+ reg32 = ( SPI_CR1(spi) & 0xffc7 ); /* clear bits [5:3] */
+ reg32 |= (baudrate << 3);
+ SPI_CR1(spi) = reg32;
+}
+
+void spi_set_master_mode(u32 spi)
+{
+ SPI_CR1(spi) |= SPI_CR1_MSTR;
+}
+
+void spi_set_slave_mode(u32 spi)
+{
+ SPI_CR1(spi) &= ~SPI_CR1_MSTR;
+}
+
+void spi_set_clock_polarity_1(u32 spi)
+{
+ SPI_CR1(spi) |= SPI_CR1_CPOL;
+}
+
+void spi_set_clock_polarity_0(u32 spi)
+{
+ SPI_CR1(spi) &= ~SPI_CR1_CPOL;
+}
+
+void spi_set_clock_phase_1(u32 spi)
+{
+ SPI_CR1(spi) |= SPI_CR1_CPHA;
+}
+
+void spi_set_clock_phase_0(u32 spi)
+{
+ SPI_CR1(spi) &= ~SPI_CR1_CPHA;
+}
+
+void spi_enable_tx_buffer_empty_interrupt(u32 spi)
+{
+ SPI_CR2(spi) |= SPI_CR2_TXEIE;
+}
+
+void spi_disable_tx_buffer_empty_interrupt(u32 spi)
+{
+ SPI_CR2(spi) &= ~SPI_CR2_TXEIE;
+}
+
+void spi_enable_rx_buffer_not_empty_interrupt(u32 spi)
+{
+ SPI_CR2(spi) |= SPI_CR2_RXNEIE;
+}
+
+void spi_disable_rx_buffer_not_empty_interrupt(u32 spi)
+{
+ SPI_CR2(spi) &= ~SPI_CR2_RXNEIE;
+}
+
+void spi_enable_error_interrupt(u32 spi)
+{
+ SPI_CR2(spi) |= SPI_CR2_ERRIE;
+}
+
+void spi_disable_error_interrupt(u32 spi)
+{
+ SPI_CR2(spi) &= ~SPI_CR2_ERRIE;
+}
+
+void spi_enable_ss_output(u32 spi)
+{
+ SPI_CR2(spi) |= SPI_CR2_SSOE;
+}
+
+void spi_disable_ss_output(u32 spi)
+{
+ SPI_CR2(spi) &= ~SPI_CR2_SSOE;
+}
+
+void spi_enable_tx_dma(u32 spi)
+{
+ SPI_CR2(spi) |= SPI_CR2_TXDMAEN;
+}
+
+void spi_disable_tx_dma(u32 spi)
+{
+ SPI_CR2(spi) &= ~SPI_CR2_TXDMAEN;
+}
+
+void spi_enable_rx_dma(u32 spi)
+{
+ SPI_CR2(spi) |= SPI_CR2_RXDMAEN;
+}
+
+void spi_disable_rx_dma(u32 spi)
+{
+ SPI_CR2(spi) &= ~SPI_CR2_RXDMAEN;
+}
+