From 556140dd629780274bff5f9bd656a78ac551cf3b Mon Sep 17 00:00:00 2001
From: Ari Sundholm <megari@iki.fi>
Date: Thu, 5 Nov 2020 18:43:52 +0200
Subject: [PATCH] i2c_opencores.[ch], spi_io.[ch]: Improve const correctness.

---
 ip/i2c_opencores/HAL/inc/i2c_opencores.h | 2 +-
 ip/i2c_opencores/HAL/src/i2c_opencores.c | 2 +-
 software/sys_controller/ulibSD/spi_io.c  | 2 +-
 software/sys_controller/ulibSD/spi_io.h  | 2 +-
 4 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/ip/i2c_opencores/HAL/inc/i2c_opencores.h b/ip/i2c_opencores/HAL/inc/i2c_opencores.h
index d6817f1..500e231 100644
--- a/ip/i2c_opencores/HAL/inc/i2c_opencores.h
+++ b/ip/i2c_opencores/HAL/inc/i2c_opencores.h
@@ -17,7 +17,7 @@ int I2C_start(alt_u32 base, alt_u32 add, alt_u32 read);
 alt_u32 I2C_read(alt_u32 base,alt_u32 last);
 alt_u32 I2C_write(alt_u32 base,alt_u8 data, alt_u32 last);
 void SPI_read(alt_u32 base, alt_u8 *rdata, int len);
-void SPI_write(alt_u32 base, alt_u8 *wdata, int len);
+void SPI_write(alt_u32 base, const alt_u8 *wdata, int len);
 #define I2C_OK (0)
 #define I2C_ACK (0)
 #define I2C_NOACK (1)
diff --git a/ip/i2c_opencores/HAL/src/i2c_opencores.c b/ip/i2c_opencores/HAL/src/i2c_opencores.c
index 49b2a9e..96a39d5 100644
--- a/ip/i2c_opencores/HAL/src/i2c_opencores.c
+++ b/ip/i2c_opencores/HAL/src/i2c_opencores.c
@@ -197,7 +197,7 @@ void SPI_read(alt_u32 base, alt_u8 *rdata, int len)
     }
 }
 
-void SPI_write(alt_u32 base, alt_u8 *wdata, int len)
+void SPI_write(alt_u32 base, const alt_u8 *wdata, int len)
 {
     int i;
 
diff --git a/software/sys_controller/ulibSD/spi_io.c b/software/sys_controller/ulibSD/spi_io.c
index 2e3cd7b..949bd65 100644
--- a/software/sys_controller/ulibSD/spi_io.c
+++ b/software/sys_controller/ulibSD/spi_io.c
@@ -15,7 +15,7 @@ void SPI_Init (void) {
     I2C_init(SD_SPI_BASE,ALT_CPU_FREQ,400000);
 }
 
-void SPI_W(BYTE *wd, int len) {
+void SPI_W(const BYTE *wd, int len) {
     SPI_write(SD_SPI_BASE, wd, len);
 }
 
diff --git a/software/sys_controller/ulibSD/spi_io.h b/software/sys_controller/ulibSD/spi_io.h
index b490469..6dbfe95 100644
--- a/software/sys_controller/ulibSD/spi_io.h
+++ b/software/sys_controller/ulibSD/spi_io.h
@@ -33,7 +33,7 @@ void SPI_R (BYTE *rd, int len);
     \param *wd Pointer to array which holds the bytes.
     \param len Length of the array.
  */
-void SPI_W (BYTE *wd, int len);
+void SPI_W (const BYTE *wd, int len);
 
 /**
     \brief Read a single byte.