From c484947cdfa52a6ffd06f66630ec4547cb9463b4 Mon Sep 17 00:00:00 2001
From: William Clark <wrvc96@gmail.com>
Date: Sat, 6 Jan 2024 17:19:24 +0000
Subject: [PATCH] change tab to 4s

---
 i2c.c    |  82 ++++++++++++++++----------------
 lis3dh.h |  10 ++--
 spi.c    | 140 +++++++++++++++++++++++++++----------------------------
 3 files changed, 116 insertions(+), 116 deletions(-)

diff --git a/i2c.c b/i2c.c
index 6f6a080..a797000 100644
--- a/i2c.c
+++ b/i2c.c
@@ -29,63 +29,63 @@ Example I2C use on linux/raspberry pi
 static int fd;
 
 int i2c_init(void) {
-	fd = open(I2C_DEVICE, O_RDWR);
-	if (fd < 0) {
-		fprintf(stderr, "i2c_init(): could not open device: %s\n", I2C_DEVICE);
-		return 1;
-	}
+    fd = open(I2C_DEVICE, O_RDWR);
+    if (fd < 0) {
+        fprintf(stderr, "i2c_init(): could not open device: %s\n", I2C_DEVICE);
+        return 1;
+    }
 
-	if (ioctl(fd, I2C_SLAVE, I2C_LIS3DH_ADDRESS) < 0) {
-		fprintf(stderr, "i2c_init(): failed to acquire bus/talk to slave\n");
-		close(fd);
-		return 1;
-	}
+    if (ioctl(fd, I2C_SLAVE, I2C_LIS3DH_ADDRESS) < 0) {
+        fprintf(stderr, "i2c_init(): failed to acquire bus/talk to slave\n");
+        close(fd);
+        return 1;
+    }
 
-	return 0;
+    return 0;
 }
 
 int i2c_read(uint8_t reg, uint8_t *dst, uint32_t size) {
-	uint8_t cmd[2];
+    uint8_t cmd[2];
 
-	if (size > 1) {
-		reg |= 0x80; /* AUTO INC */
-	}
+    if (size > 1) {
+        reg |= 0x80; /* AUTO INC */
+    }
 
-	cmd[0] = reg;
-	cmd[1] = 0x00;
+    cmd[0] = reg;
+    cmd[1] = 0x00;
 
-	if (write(fd, cmd, 2) != 2) {
-		fprintf(stderr, "i2c_read(): error write()\n");
-		return 1;
-	}
-	
-	if (read(fd, dst, size) != (int)size) {
-		fprintf(stderr, "i2c_read(): error read()\n");
-		return 1;
-	
-	}
+    if (write(fd, cmd, 2) != 2) {
+        fprintf(stderr, "i2c_read(): error write()\n");
+        return 1;
+    }
+    
+    if (read(fd, dst, size) != (int)size) {
+        fprintf(stderr, "i2c_read(): error read()\n");
+        return 1;
+    
+    }
 
-	return 0;
+    return 0;
 }
 
 int i2c_write(uint8_t reg, uint8_t value) {
-	uint8_t cmd[2];
+    uint8_t cmd[2];
 
-	cmd[0] = reg;
-	cmd[1] = value;
-	
-	if (write(fd, cmd, 2) != 2) {
-		fprintf(stderr, "i2c_write(): error write()\n");
-		return 1;
-	}
+    cmd[0] = reg;
+    cmd[1] = value;
+    
+    if (write(fd, cmd, 2) != 2) {
+        fprintf(stderr, "i2c_write(): error write()\n");
+        return 1;
+    }
 
-	return 0;
+    return 0;
 }
 
 int i2c_deinit(void) {
-	if (fd) {
-		close(fd);
-	}
+    if (fd) {
+        close(fd);
+    }
 
-	return 0;
+    return 0;
 }
diff --git a/lis3dh.h b/lis3dh.h
index e39cfce..46e249a 100644
--- a/lis3dh.h
+++ b/lis3dh.h
@@ -112,11 +112,11 @@
 
 /* user provided functions, init and deinit can be set to NULL and won't be used */
 struct lis3dh_device {
-	int (*init)(void);
-	int (*read)(uint8_t reg, uint8_t *dst, uint32_t size);
-	int (*write)(uint8_t reg, uint8_t value);
-	int (*sleep)(uint32_t dur_us);
-	int (*deinit)(void);
+    int (*init)(void);
+    int (*read)(uint8_t reg, uint8_t *dst, uint32_t size);
+    int (*write)(uint8_t reg, uint8_t value);
+    int (*sleep)(uint32_t dur_us);
+    int (*deinit)(void);
 };
 
 struct lis3dh_click_config {
diff --git a/spi.c b/spi.c
index 427c928..487810b 100644
--- a/spi.c
+++ b/spi.c
@@ -31,111 +31,111 @@ Example SPI use on linux/raspberry pi
 static int fd;
 
 int spi_init(void) {
-	uint8_t mode = SPI_MODE_0;
-	uint8_t bits = 8;
-	uint32_t speed = SPI_SPEED;
+    uint8_t mode = SPI_MODE_0;
+    uint8_t bits = 8;
+    uint32_t speed = SPI_SPEED;
 
-	if ((fd = open(SPI_DEVICE, O_RDWR)) < 0) {
-		fprintf(stderr, "spi_init(): open(%s)\n", SPI_DEVICE);
-		return 1;
-	}
+    if ((fd = open(SPI_DEVICE, O_RDWR)) < 0) {
+        fprintf(stderr, "spi_init(): open(%s)\n", SPI_DEVICE);
+        return 1;
+    }
 
-	if (ioctl(fd, SPI_IOC_RD_MODE, &mode) == -1) {
-		fprintf(stderr, "spi_init(): SPI_IOC_RD_MODE\n");
-		return 1;
-	}
+    if (ioctl(fd, SPI_IOC_RD_MODE, &mode) == -1) {
+        fprintf(stderr, "spi_init(): SPI_IOC_RD_MODE\n");
+        return 1;
+    }
 
-	if (ioctl(fd, SPI_IOC_WR_MODE, &mode) == -1) {
-		fprintf(stderr, "spi_init(): SPI_IOC_WR_MODE\n");
-		return 1;
-	}
+    if (ioctl(fd, SPI_IOC_WR_MODE, &mode) == -1) {
+        fprintf(stderr, "spi_init(): SPI_IOC_WR_MODE\n");
+        return 1;
+    }
 
-	if (ioctl(fd, SPI_IOC_WR_BITS_PER_WORD, &bits) == -1) {
-		fprintf(stderr, "spi_init(): SPI_IOC_WR_BITS_PER_WORD\n");
-		return 1;
-	}
+    if (ioctl(fd, SPI_IOC_WR_BITS_PER_WORD, &bits) == -1) {
+        fprintf(stderr, "spi_init(): SPI_IOC_WR_BITS_PER_WORD\n");
+        return 1;
+    }
 
-	if (ioctl(fd, SPI_IOC_RD_BITS_PER_WORD, &bits) == -1) {
-		fprintf(stderr, "spi_init(): SPI_IOC_RD_BITS_PER_WORD\n");
-		return 1;
-	}
+    if (ioctl(fd, SPI_IOC_RD_BITS_PER_WORD, &bits) == -1) {
+        fprintf(stderr, "spi_init(): SPI_IOC_RD_BITS_PER_WORD\n");
+        return 1;
+    }
 
-	if (ioctl(fd, SPI_IOC_WR_MAX_SPEED_HZ, &speed) == -1) {
-		fprintf(stderr, "spi_init(): SPI_IOC_WR_MAX_SPEED_HZ\n");
-		return 1;
-	}
+    if (ioctl(fd, SPI_IOC_WR_MAX_SPEED_HZ, &speed) == -1) {
+        fprintf(stderr, "spi_init(): SPI_IOC_WR_MAX_SPEED_HZ\n");
+        return 1;
+    }
 
-	if (ioctl(fd, SPI_IOC_RD_MAX_SPEED_HZ, &speed) == -1) {
-		fprintf(stderr, "spi_init(): SPI_IOC_RD_MAX_SPEED_HZ\n");
-		return 1;
-	}
-	
-	return 0;
+    if (ioctl(fd, SPI_IOC_RD_MAX_SPEED_HZ, &speed) == -1) {
+        fprintf(stderr, "spi_init(): SPI_IOC_RD_MAX_SPEED_HZ\n");
+        return 1;
+    }
+    
+    return 0;
 }
 
 int spi_read(uint8_t reg, uint8_t *dst, uint32_t size) {
 
-	uint8_t send[2];
-	struct spi_ioc_transfer tr[2] = {0};
+    uint8_t send[2];
+    struct spi_ioc_transfer tr[2] = {0};
 
-	/* clear 2 MSbits */
-	reg &= 0x3F;
+    /* clear 2 MSbits */
+    reg &= 0x3F;
 
-	/* set READ bit */
+    /* set READ bit */
     reg |= 0x80;
     
     if (size > 1) {
-		/* set AUTO INC bit */
+        /* set AUTO INC bit */
         reg |= 0x40;
     }
 
-	send[0] = reg;
-	send[1] = 0x00;
+    send[0] = reg;
+    send[1] = 0x00;
 
-	tr[0].tx_buf = (unsigned long) send;
-	tr[0].rx_buf = (unsigned long) 0;
-	tr[0].len = 2;
+    tr[0].tx_buf = (unsigned long) send;
+    tr[0].rx_buf = (unsigned long) 0;
+    tr[0].len = 2;
 
-	tr[1].tx_buf = (unsigned long) 0;
-	tr[1].rx_buf = (unsigned long) dst;
-	tr[1].len = size;
+    tr[1].tx_buf = (unsigned long) 0;
+    tr[1].rx_buf = (unsigned long) dst;
+    tr[1].len = size;
 
-	if (ioctl(fd, SPI_IOC_MESSAGE(2), tr) < 0) {
-		fprintf(stderr, "spi_read(): error ioctl()\n");
-		return 1;
-	}
+    if (ioctl(fd, SPI_IOC_MESSAGE(2), tr) < 0) {
+        fprintf(stderr, "spi_read(): error ioctl()\n");
+        return 1;
+    }
 
-	return 0;
+    return 0;
 }
 
 int spi_write(uint8_t reg, uint8_t value) {
-	struct spi_ioc_transfer tr[2] = {0};
+    struct spi_ioc_transfer tr[2] = {0};
 
-	/* clear 2 MSbits */
-	reg &= 0x3F;
+    /* clear 2 MSbits */
+    reg &= 0x3F;
 
-	tr[0].tx_buf = (unsigned long) &reg;
-	tr[0].rx_buf = (unsigned long) 0;
-	tr[0].len = 1;
+    tr[0].tx_buf = (unsigned long) &reg;
+    tr[0].rx_buf = (unsigned long) 0;
+    tr[0].len = 1;
 
-	tr[1].tx_buf = (unsigned long) &value;
-	tr[1].rx_buf = (unsigned long) 0;
-	tr[1].len = 1;
+    tr[1].tx_buf = (unsigned long) &value;
+    tr[1].rx_buf = (unsigned long) 0;
+    tr[1].len = 1;
 
-	if (ioctl(fd, SPI_IOC_MESSAGE(2), tr) < 0) {
-		fprintf(stderr, "spi_write(): error ioctl()\n");
-		return 1;
-	}
+    if (ioctl(fd, SPI_IOC_MESSAGE(2), tr) < 0) {
+        fprintf(stderr, "spi_write(): error ioctl()\n");
+        return 1;
+    }
 
-	return 0;
+    return 0;
 }
 
 int spi_deinit(void) {
 
-	if (fd) {
-		close(fd);
-	}
+    if (fd) {
+        close(fd);
+    }
 
-	return 0;
+    return 0;
 }