From d9c3fba928162e7a89349f8b160eb479ad41cbea Mon Sep 17 00:00:00 2001
From: Nathaniel Graff <nathaniel.graff@sifive.com>
Date: Thu, 7 Mar 2019 09:29:05 -0800
Subject: Remove legacy examples

Signed-off-by: Nathaniel Graff <nathaniel.graff@sifive.com>
---
 software/i2c_demo/.gitignore |   1 -
 software/i2c_demo/Makefile   |   6 -
 software/i2c_demo/i2c_demo.c | 318 -------------------------------------------
 3 files changed, 325 deletions(-)
 delete mode 100644 software/i2c_demo/.gitignore
 delete mode 100644 software/i2c_demo/Makefile
 delete mode 100644 software/i2c_demo/i2c_demo.c

(limited to 'software/i2c_demo')

diff --git a/software/i2c_demo/.gitignore b/software/i2c_demo/.gitignore
deleted file mode 100644
index 7a8011b..0000000
--- a/software/i2c_demo/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-i2c_demo
diff --git a/software/i2c_demo/Makefile b/software/i2c_demo/Makefile
deleted file mode 100644
index ef29ef2..0000000
--- a/software/i2c_demo/Makefile
+++ /dev/null
@@ -1,6 +0,0 @@
-TARGET = i2c_demo
-C_SRCS += i2c_demo.c
-CFLAGS += -O2 -fno-builtin-printf
-
-BSP_BASE = ../../bsp
-include $(BSP_BASE)/env/common.mk
diff --git a/software/i2c_demo/i2c_demo.c b/software/i2c_demo/i2c_demo.c
deleted file mode 100644
index 4011c09..0000000
--- a/software/i2c_demo/i2c_demo.c
+++ /dev/null
@@ -1,318 +0,0 @@
-#include <stdio.h>
-#include <stdlib.h>
-#include "platform.h"
-#include <string.h>
-#include <unistd.h>
-#include <math.h>
-#include "stdatomic.h"
-
-#define MPU6050_ADDR 0x68
-
-#define MPU6050_RA_ACCEL_XOUT_H     0x3B
-#define MPU6050_RA_ACCEL_XOUT_L     0x3C
-#define MPU6050_RA_ACCEL_YOUT_H     0x3D
-#define MPU6050_RA_ACCEL_YOUT_L     0x3E
-#define MPU6050_RA_ACCEL_ZOUT_H     0x3F
-#define MPU6050_RA_ACCEL_ZOUT_L     0x40
-#define MPU6050_RA_TEMP_OUT_H       0x41
-#define MPU6050_RA_TEMP_OUT_L       0x42
-#define MPU6050_RA_GYRO_XOUT_H      0x43
-#define MPU6050_RA_GYRO_XOUT_L      0x44
-#define MPU6050_RA_GYRO_YOUT_H      0x45
-#define MPU6050_RA_GYRO_YOUT_L      0x46
-#define MPU6050_RA_GYRO_ZOUT_H      0x47
-#define MPU6050_RA_GYRO_ZOUT_L      0x48
-#define MPU6050_RA_PWR_MGMT_1       0x6B
-#define MPU6050_RA_WHO_AM_I         0x75
-
-#define SDA PIN_8_OFFSET
-#define SCL PIN_9_OFFSET
-
-#define LONG 25 // Equals ~400KHz
-#define SHORT 5
-
-//busy wait for the specified time
-void wait_ms(uint64_t ms) {
-  static const uint64_t ms_tick = RTC_FREQ/1000;
-  volatile uint64_t * mtime  = (uint64_t*) (CLINT_CTRL_ADDR + CLINT_MTIME);
-  uint64_t then = (ms_tick * ms) + *mtime;
-  while(*mtime<then);
-}
-
-inline void delay_number_of_nop(uint32_t count)
-{
-  for(volatile uint32_t j = 0; j < count; j++)
-  {
-    asm("nop");
-  }
-}
-
-_Bool i2c_busy(void)
-{
-  GPIO_REG(GPIO_INPUT_EN) |= ((0x1 << SCL) | (0x1 << SDA));
-  GPIO_REG(GPIO_OUTPUT_EN)  &= ~((0x1 << SCL) | (0x1 << SDA));
-  return (GPIO_REG(GPIO_INPUT_VAL) & ((0x1 << SCL) | (0x1 << SDA))) != ((0x1 << SCL) | (0x1 << SDA));
-}
-
-void i2c_start(void)
-{
-  GPIO_REG(GPIO_INPUT_EN)  &=  ~((0x1 << SDA) | (0x1 << SCL));
-
-  GPIO_REG(GPIO_OUTPUT_VAL) &= ~(0x1 << SDA);
-  GPIO_REG(GPIO_OUTPUT_EN)  |=  (0x1 << SDA);
-  delay_number_of_nop(SHORT);
-  GPIO_REG(GPIO_OUTPUT_VAL) &= ~(0x1 << SCL);
-  GPIO_REG(GPIO_OUTPUT_EN)  |=  (0x1 << SCL);
-}
-
-void i2c_repeated_start(void)
-{
-  delay_number_of_nop(SHORT);
-  GPIO_REG(GPIO_OUTPUT_VAL) |=  (0x1 << SCL);
-  GPIO_REG(GPIO_OUTPUT_EN)  |=  (0x1 << SCL);
-  delay_number_of_nop(SHORT);
-  i2c_start();
-}
-
-
-void i2c_stop(void)
-{
-  GPIO_REG(GPIO_INPUT_EN) |= (0x1 << SCL);
-  GPIO_REG(GPIO_OUTPUT_EN)  &= ~(0x1 << SCL);
-  delay_number_of_nop(SHORT);
-  GPIO_REG(GPIO_INPUT_EN) |= (0x1 << SDA);
-  GPIO_REG(GPIO_OUTPUT_EN)  &= ~(0x1 << SDA);
-}
-
-void i2c_init(void)
-{
-  //GPIO_REG(GPIO_IOF_EN) &= ((0x1 << SCL) | (0x1 << SDA));
-  GPIO_REG(GPIO_OUTPUT_EN) &= ~((0x1 << SCL) | (0x1 << SDA));
-  GPIO_REG(GPIO_PULLUP_EN) |= ((0x1 << SDA) | (0x1 << SCL));
-  GPIO_REG(GPIO_INPUT_EN)  |=  (0x1 << SDA) | (0x1 << SCL);
-}
-
-void i2c_send_bytes_rs(uint8_t* data, uint8_t size, _Bool rs, uint8_t* data_r, uint8_t size_r)
-{
-  uint8_t address_r = data[0] | 0x01;
-
-  for(uint8_t ii=0; ii<size; ii++)
-  {
-    GPIO_REG(GPIO_INPUT_EN)  &= ~(0x1 << SDA);
-    GPIO_REG(GPIO_OUTPUT_EN) |=  (0x1 << SDA);
-    for(uint8_t i=0; i<9; i++)
-    {
-      delay_number_of_nop(SHORT);
-
-      if(i != 8)
-      {
-        if(data[ii] & 0x80)
-          GPIO_REG(GPIO_OUTPUT_VAL) |=  (0x1 << SDA);
-        else
-          GPIO_REG(GPIO_OUTPUT_VAL) &= ~(0x1 << SDA);
-      }
-      else
-      {
-        GPIO_REG(GPIO_INPUT_EN)  |=  (0x1 << SDA);
-        GPIO_REG(GPIO_OUTPUT_EN) &= ~(0x1 << SDA);
-        if((GPIO_REG(GPIO_INPUT_VAL) & (0x1 << SDA)) != 0x0)
-        {
-            printf("NO ACK\n");
-        }
-
-        GPIO_REG(GPIO_INPUT_EN)  &= ~(0x1 << SDA);
-        GPIO_REG(GPIO_OUTPUT_EN) |=  (0x1 << SDA);
-        if(rs == 0)
-        {
-          GPIO_REG(GPIO_OUTPUT_VAL) &= ~(0x1 << SDA);
-        }
-        else
-        {
-          GPIO_REG(GPIO_OUTPUT_VAL) |= (0x1 << SDA);
-        }
-
-      }
-      delay_number_of_nop(LONG-SHORT);
-
-      GPIO_REG(GPIO_OUTPUT_VAL) |= (0x1 << SCL);
-
-      delay_number_of_nop(LONG);
-
-      GPIO_REG(GPIO_OUTPUT_VAL) &= ~(0x1 << SCL);
-
-      data[ii] <<= 1;
-    }
-  }
-
-  if(rs == 0)
-    return;
-
-  GPIO_REG(GPIO_OUTPUT_VAL) |= (0x1 << SCL);
-
-  delay_number_of_nop(SHORT);
-
-  GPIO_REG(GPIO_OUTPUT_VAL) &= ~(0x1 << SDA);
-
-  delay_number_of_nop(SHORT);
-
-  GPIO_REG(GPIO_OUTPUT_VAL) &= ~(0x1 << SCL);
-
-  for(uint8_t i=0; i<9; i++)
-  {
-    delay_number_of_nop(SHORT);
-    if(i != 8)
-    {
-      if(address_r & 0x80)
-        GPIO_REG(GPIO_OUTPUT_VAL) |=  (0x1 << SDA);
-      else
-        GPIO_REG(GPIO_OUTPUT_VAL) &= ~(0x1 << SDA);
-    }
-    else
-    {
-      GPIO_REG(GPIO_INPUT_EN)  |=  (0x1 << SDA);
-      GPIO_REG(GPIO_OUTPUT_EN) &= ~(0x1 << SDA);
-      if((GPIO_REG(GPIO_INPUT_VAL) & (0x1 << SDA)) != 0x0)
-      {
-          printf("NO ACK\n");
-      }
-    }
-    delay_number_of_nop(LONG-SHORT);
-
-    GPIO_REG(GPIO_OUTPUT_VAL) |= (0x1 << SCL);
-
-    delay_number_of_nop(LONG);
-
-    GPIO_REG(GPIO_OUTPUT_VAL) &= ~(0x1 << SCL);
-
-    address_r <<= 1;
-  }
-
-  // Receive Data
-  for(uint8_t ii=0; ii<size_r; ii++)
-  {
-    for(uint8_t i=0; i<9; i++)
-    {
-      GPIO_REG(GPIO_OUTPUT_VAL) |= (0x1 << SCL);
-
-      if(i!=8)
-        data_r[ii] <<= 1;
-
-      delay_number_of_nop(SHORT);
-
-      if(i!=8)
-      {
-        if((GPIO_REG(GPIO_INPUT_VAL) & (0x1 << SDA)) != 0x0)
-        {
-          data_r[ii] |= 0x1;
-        }
-      }
-      else if(ii == (size_r-1))
-      {
-        GPIO_REG(GPIO_INPUT_EN)  &= ~(0x1 << SDA);
-        GPIO_REG(GPIO_OUTPUT_EN) |=  (0x1 << SDA);
-        GPIO_REG(GPIO_OUTPUT_VAL) &= ~(0x1 << SDA);
-      } else {
-
-      }
-
-      delay_number_of_nop(LONG-SHORT);
-
-      GPIO_REG(GPIO_OUTPUT_VAL) &= ~(0x1 << SCL);
-
-      if((i==7) && (ii != (size_r-1))){
-          GPIO_REG(GPIO_INPUT_EN)  &= ~(0x1 << SDA);
-          GPIO_REG(GPIO_OUTPUT_EN) |=  (0x1 << SDA);
-          GPIO_REG(GPIO_OUTPUT_VAL) &= ~(0x1 << SDA);
-      }
-      delay_number_of_nop(LONG);
-
-    }
-
-    if(ii != (size_r-1)){
-          GPIO_REG(GPIO_INPUT_EN)  |=  (0x1 << SDA);
-          GPIO_REG(GPIO_OUTPUT_EN) &= ~(0x1 << SDA);
-          delay_number_of_nop(SHORT);
-    }
-  }
-}
-
-void write_byte(uint8_t address, uint8_t reg_addr, uint8_t val)
-{
-  uint8_t temp[3];
-  uint8_t data;
-  temp[0]=address<<1;
-  temp[1]=reg_addr;
-  temp[2]=val;
-  while(i2c_busy());
-  i2c_start();
-  i2c_send_bytes_rs(temp, sizeof(temp), 0, &data, 1);
-  i2c_stop();
-}
-
-uint8_t read_byte(uint8_t address, uint8_t reg_addr)
-{
-  uint8_t temp[2];
-  uint8_t data;
-  temp[0]=address<<1;
-  temp[1]=reg_addr;
-  while(i2c_busy());
-  i2c_start();
-  i2c_send_bytes_rs(temp, sizeof(temp), 1, &data, 1);
-  i2c_stop();
-  return data;
-}
-
-void read_bytes(uint8_t address, uint8_t reg_addr, uint8_t* data, uint8_t size)
-{
-  uint8_t temp[2];
-  temp[0]=address<<1;
-  temp[1]=reg_addr;
-  while(i2c_busy());
-  i2c_start();
-  i2c_send_bytes_rs(temp, sizeof(temp), 1, data, size);
-  i2c_stop();
-}
-
-int main(int argc, char **argv)
-{
-  uint8_t data;
-  uint8_t accel[6];
-
-  printf("BIT-BANG I2C DEMO with MPU-6050 IMU\n");
-
-  i2c_init();
-
-  printf("Power Management 1: 0x%02X\n", read_byte(MPU6050_ADDR, MPU6050_RA_PWR_MGMT_1));
-  write_byte(MPU6050_ADDR, MPU6050_RA_PWR_MGMT_1, 0x80);
-
-  wait_ms(10);
-
-  printf("Power Management 1: 0x%02X\n", read_byte(MPU6050_ADDR, MPU6050_RA_PWR_MGMT_1));
-  write_byte(MPU6050_ADDR, MPU6050_RA_PWR_MGMT_1, 0x00);
-
-  printf("CHIP_ID: 0x%02X\n", read_byte(MPU6050_ADDR, MPU6050_RA_WHO_AM_I));
-  printf("DONE\n");
-
-  while(1)
-  {
-    //for(uint8_t i=0; i<6; i++){
-    //  accel[i]=read_byte(MPU6050_ADDR, 0x3B+i);
-    //}
-    read_bytes(MPU6050_ADDR, 0x3B, accel, 6);
-    int16_t x_accel = (accel[0]<<8)+accel[1];
-    int16_t y_accel = (accel[2]<<8)+accel[3];
-    int16_t z_accel = (accel[4]<<8)+accel[5];
-
-    float z_g = z_accel;
-    z_g = z_g/16384.0;
-    int32_t z_g_int = z_g*100;
-    z_g_int = abs(z_g_int);
-    printf("Gravity in Z %d.%d\n", z_g_int/100, z_g_int%100);
-
-    //printf("X: %06d, Y: %06d, Z: %06d\n", x_accel, y_accel, z_accel);
-
-    wait_ms(100);
-  }
-
-  return 0;
-}
-- 
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