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Diffstat (limited to 'code/fe310/eos')
-rw-r--r--code/fe310/eos/spi.c58
-rw-r--r--code/fe310/eos/spi.h3
2 files changed, 32 insertions, 29 deletions
diff --git a/code/fe310/eos/spi.c b/code/fe310/eos/spi.c
index 0191e3f..3c45ad9 100644
--- a/code/fe310/eos/spi.c
+++ b/code/fe310/eos/spi.c
@@ -41,26 +41,6 @@ static void spi_handler_evt(unsigned char type, unsigned char *buffer, uint16_t
}
}
-void spi_cs_set(void) {
- /* cs low */
- if (SPI1_REG(SPI_REG_CSMODE) == SPI_CSMODE_OFF) {
- GPIO_REG(GPIO_OUTPUT_VAL) &= ~(1 << spi_dev_cs);
- } else {
- SPI1_REG(SPI_REG_CSMODE) = SPI_CSMODE_HOLD;
- }
- spi_state_flags &= ~SPI_FLAG_CS;
-}
-
-void spi_cs_clear(void) {
- /* cs high */
- if (SPI1_REG(SPI_REG_CSMODE) == SPI_CSMODE_OFF) {
- GPIO_REG(GPIO_OUTPUT_VAL) |= (1 << spi_dev_cs);
- } else {
- SPI1_REG(SPI_REG_CSMODE) = SPI_CSMODE_AUTO;
- }
- spi_state_flags |= SPI_FLAG_CS;
-}
-
static void spi_flush(void) {
SPI1_REG(SPI_REG_RXCTRL) = SPI_TXWM(1);
while (!(SPI1_REG(SPI_REG_IP) & SPI_IP_TXWM));
@@ -69,7 +49,7 @@ static void spi_flush(void) {
static void spi_xchg_done(void) {
spi_state_flags &= ~SPI_FLAG_XCHG;
- if (!(spi_state_flags & (EOS_SPI_FLAG_MORE | SPI_FLAG_CS))) spi_cs_clear();
+ if (!(spi_state_flags & (EOS_SPI_FLAG_MORE | SPI_FLAG_CS))) eos_spi_cs_clear();
SPI1_REG(SPI_REG_IE) = 0x0;
}
@@ -135,7 +115,7 @@ void eos_spi_dev_acquire(unsigned char dev) {
void eos_spi_dev_release(void) {
if (spi_wait) spi_xchg_wait();
if (spi_state_flags & EOS_SPI_FLAG_TX) spi_flush();
- if (!(spi_state_flags & SPI_FLAG_CS)) spi_cs_clear();
+ if (!(spi_state_flags & SPI_FLAG_CS)) eos_spi_cs_clear();
spi_dev = EOS_SPI_DEV_NET;
eos_net_start();
@@ -153,7 +133,7 @@ void eos_spi_xchg(unsigned char *buffer, uint16_t len, uint8_t flags) {
_eos_spi_state_idx_tx = 0;
_eos_spi_state_idx_rx = 0;
- if (spi_state_flags & SPI_FLAG_CS) spi_cs_set();
+ if (spi_state_flags & SPI_FLAG_CS) eos_spi_cs_set();
SPI1_REG(SPI_REG_TXCTRL) = SPI_TXWM(SPI_SIZE_WM);
SPI1_REG(SPI_REG_IE) = SPI_IP_TXWM;
}
@@ -192,6 +172,26 @@ void eos_spi_xchg_handler(void) {
}
}
+void eos_spi_cs_set(void) {
+ /* cs low */
+ if (SPI1_REG(SPI_REG_CSMODE) == SPI_CSMODE_OFF) {
+ GPIO_REG(GPIO_OUTPUT_VAL) &= ~(1 << spi_dev_cs);
+ } else {
+ SPI1_REG(SPI_REG_CSMODE) = SPI_CSMODE_HOLD;
+ }
+ spi_state_flags &= ~SPI_FLAG_CS;
+}
+
+void eos_spi_cs_clear(void) {
+ /* cs high */
+ if (SPI1_REG(SPI_REG_CSMODE) == SPI_CSMODE_OFF) {
+ GPIO_REG(GPIO_OUTPUT_VAL) |= (1 << spi_dev_cs);
+ } else {
+ SPI1_REG(SPI_REG_CSMODE) = SPI_CSMODE_AUTO;
+ }
+ spi_state_flags |= SPI_FLAG_CS;
+}
+
uint8_t eos_spi_xchg8(uint8_t data, uint8_t flags) {
volatile uint32_t x = 0;
uint8_t rx = !(flags & EOS_SPI_FLAG_TX);
@@ -201,7 +201,7 @@ uint8_t eos_spi_xchg8(uint8_t data, uint8_t flags) {
spi_state_flags &= 0xF0;
spi_state_flags |= flags;
- if (spi_state_flags & SPI_FLAG_CS) spi_cs_set();
+ if ((spi_state_flags & EOS_SPI_FLAG_AUTOCS) && (spi_state_flags & SPI_FLAG_CS)) eos_spi_cs_set();
while (SPI1_REG(SPI_REG_TXFIFO) & SPI_TXFIFO_FULL);
SPI1_REG(SPI_REG_TXFIFO) = data;
@@ -210,7 +210,7 @@ uint8_t eos_spi_xchg8(uint8_t data, uint8_t flags) {
while ((x = SPI1_REG(SPI_REG_RXFIFO)) & SPI_RXFIFO_EMPTY);
}
- if (!(spi_state_flags & (EOS_SPI_FLAG_MORE | SPI_FLAG_CS))) spi_cs_clear();
+ if ((spi_state_flags & EOS_SPI_FLAG_AUTOCS) && !(spi_state_flags & EOS_SPI_FLAG_MORE)) eos_spi_cs_clear();
return x & 0xFF;
}
@@ -225,7 +225,7 @@ uint16_t eos_spi_xchg16(uint16_t data, uint8_t flags) {
spi_state_flags &= 0xF0;
spi_state_flags |= flags;
- if (spi_state_flags & SPI_FLAG_CS) spi_cs_set();
+ if ((spi_state_flags & EOS_SPI_FLAG_AUTOCS) && (spi_state_flags & SPI_FLAG_CS)) eos_spi_cs_set();
while (SPI1_REG(SPI_REG_TXFIFO) & SPI_TXFIFO_FULL);
SPI1_REG(SPI_REG_TXFIFO) = (data & 0xFF00) >> 8;
@@ -239,7 +239,7 @@ uint16_t eos_spi_xchg16(uint16_t data, uint8_t flags) {
r |= x & 0xFF;
}
- if (!(spi_state_flags & (EOS_SPI_FLAG_MORE | SPI_FLAG_CS))) spi_cs_clear();
+ if ((spi_state_flags & EOS_SPI_FLAG_AUTOCS) && !(spi_state_flags & EOS_SPI_FLAG_MORE)) eos_spi_cs_clear();
return x & 0xFF;
}
@@ -254,7 +254,7 @@ uint32_t eos_spi_xchg32(uint32_t data, uint8_t flags) {
spi_state_flags &= 0xF0;
spi_state_flags |= flags;
- if (spi_state_flags & SPI_FLAG_CS) spi_cs_set();
+ if ((spi_state_flags & EOS_SPI_FLAG_AUTOCS) && (spi_state_flags & SPI_FLAG_CS)) eos_spi_cs_set();
while (SPI1_REG(SPI_REG_TXFIFO) & SPI_TXFIFO_FULL);
SPI1_REG(SPI_REG_TXFIFO) = (data & 0xFF000000) >> 24;
@@ -276,7 +276,7 @@ uint32_t eos_spi_xchg32(uint32_t data, uint8_t flags) {
r |= x & 0xFF;
}
- if (!(spi_state_flags & (EOS_SPI_FLAG_MORE | SPI_FLAG_CS))) spi_cs_clear();
+ if ((spi_state_flags & EOS_SPI_FLAG_AUTOCS) && !(spi_state_flags & EOS_SPI_FLAG_MORE)) eos_spi_cs_clear();
return r;
}
diff --git a/code/fe310/eos/spi.h b/code/fe310/eos/spi.h
index 79da7ac..2327413 100644
--- a/code/fe310/eos/spi.h
+++ b/code/fe310/eos/spi.h
@@ -9,6 +9,7 @@
#define EOS_SPI_FLAG_TX 0x01
#define EOS_SPI_FLAG_MORE 0x02
+#define EOS_SPI_FLAG_AUTOCS 0x04
void eos_spi_init(void);
void eos_spi_dev_acquire(unsigned char dev);
@@ -17,6 +18,8 @@ void eos_spi_dev_release(void);
void eos_spi_xchg(unsigned char *buffer, uint16_t len, uint8_t flags);
void eos_spi_xchg_handler(void);
+void eos_spi_cs_set(void);
+void eos_spi_cs_clear(void);
uint8_t eos_spi_xchg8(uint8_t data, uint8_t flags);
uint16_t eos_spi_xchg16(uint16_t data, uint8_t flags);
uint32_t eos_spi_xchg32(uint32_t data, uint8_t flags);
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-27 13:44:00 +0000