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authorUros Majstorovic <majstor@majstor.org>2022-09-04 18:25:23 +0200
committerUros Majstorovic <majstor@majstor.org>2022-09-04 18:25:23 +0200
commit8775caf20ce7c0a776b9f66c5b287b077c8afcee (patch)
tree81e28ef01a2133384dec1ac522b737757e3e80ef /fw/fe310/eos/soc
parent0e0de4f197bf329fdfed876468d0c61e81021f52 (diff)
driver for lcd: ili9806e and gt911
Diffstat (limited to 'fw/fe310/eos/soc')
-rw-r--r--fw/fe310/eos/soc/Makefile2
-rw-r--r--fw/fe310/eos/soc/spi9bit.c57
-rw-r--r--fw/fe310/eos/soc/spi9bit.h4
3 files changed, 62 insertions, 1 deletions
diff --git a/fw/fe310/eos/soc/Makefile b/fw/fe310/eos/soc/Makefile
index 1404c81..f5f072a 100644
--- a/fw/fe310/eos/soc/Makefile
+++ b/fw/fe310/eos/soc/Makefile
@@ -1,7 +1,7 @@
include ../../common.mk
CFLAGS += -I$(bsp_dir)/include -I$(bsp_dir)/drivers
-obj = trap_entry.o interrupt.o timer.o pwr.o i2s.o i2c.o uart.o spi.o
+obj = trap_entry.o interrupt.o timer.o pwr.o i2s.o i2c.o uart.o spi.o spi9bit.o
lib = ../../libeos-soc.a
diff --git a/fw/fe310/eos/soc/spi9bit.c b/fw/fe310/eos/soc/spi9bit.c
new file mode 100644
index 0000000..712dc81
--- /dev/null
+++ b/fw/fe310/eos/soc/spi9bit.c
@@ -0,0 +1,57 @@
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <stdio.h>
+
+#include "encoding.h"
+#include "platform.h"
+
+#include "eos.h"
+
+#include "spi9bit.h"
+
+#define BIT_GET ((GPIO_REG(GPIO_INPUT_VAL) & (1 << IOF_SPI1_MISO)) >> IOF_SPI1_MISO)
+#define BIT_PUT(b) { if (b) GPIO_REG(GPIO_OUTPUT_VAL) |= (1 << IOF_SPI1_MOSI); else GPIO_REG(GPIO_OUTPUT_VAL) &= ~(1 << IOF_SPI1_MOSI); }
+
+#define SCK_UP { GPIO_REG(GPIO_OUTPUT_VAL) |= (1 << IOF_SPI1_SCK); }
+#define SCK_DN { GPIO_REG(GPIO_OUTPUT_VAL) &= ~(1 << IOF_SPI1_SCK); }
+
+static inline void _sleep(int n) {
+ volatile int x = n;
+
+ while(x) x--;
+}
+
+/* sck frequency for r/w operations is 0.8Mhz */
+void eos_spi9bit_read(uint8_t *data) {
+ int i;
+
+ *data = 0;
+ for (i=0; i<8; i++) {
+ _sleep(10);
+ *data = *data << 1;
+ *data |= BIT_GET;
+ SCK_UP;
+ _sleep(10);
+ SCK_DN;
+ }
+}
+
+void eos_spi9bit_write(uint8_t dc, uint8_t data) {
+ int i;
+
+ BIT_PUT(dc);
+ _sleep(10);
+ SCK_UP;
+ for (i=0; i<8; i++) {
+ _sleep(10);
+ SCK_DN;
+ BIT_PUT(data & 0x80);
+ _sleep(10);
+ SCK_UP;
+ data = data << 1;
+ }
+ _sleep(10);
+ SCK_DN;
+ BIT_PUT(0);
+}
diff --git a/fw/fe310/eos/soc/spi9bit.h b/fw/fe310/eos/soc/spi9bit.h
new file mode 100644
index 0000000..dd3c254
--- /dev/null
+++ b/fw/fe310/eos/soc/spi9bit.h
@@ -0,0 +1,4 @@
+#include <stdint.h>
+
+void eos_spi9bit_read(uint8_t *data);
+void eos_spi9bit_write(uint8_t dc, uint8_t data);