From 4d5cbec9118cbedf2d4ae5b54acaa22862245a4c Mon Sep 17 00:00:00 2001
From: Megan Wachs <megan@sifive.com>
Date: Thu, 4 May 2017 05:46:05 -0700
Subject: Update SDK For E31/E51 Coreplex IP Evaluation

---
 software/coreplexip_welcome/coreplexip_welcome.c | 124 +++++++++++++++++++++++
 1 file changed, 124 insertions(+)
 create mode 100644 software/coreplexip_welcome/coreplexip_welcome.c

(limited to 'software/coreplexip_welcome/coreplexip_welcome.c')

diff --git a/software/coreplexip_welcome/coreplexip_welcome.c b/software/coreplexip_welcome/coreplexip_welcome.c
new file mode 100644
index 0000000..c090b37
--- /dev/null
+++ b/software/coreplexip_welcome/coreplexip_welcome.c
@@ -0,0 +1,124 @@
+// See LICENSE for license details.
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <stdatomic.h>
+#include "encoding.h"
+#include <platform.h>
+
+#ifndef _SIFIVE_COREPLEXIP_ARTY_H
+#error 'coreplexip_welcome' demo only supported for Coreplex IP Eval Kits
+#endif
+
+static const char sifive_msg[] = "\n\r\
+\n\r\
+                SIFIVE, INC.\n\r\
+\n\r\
+         5555555555555555555555555\n\r\
+        5555                   5555\n\r\
+       5555                     5555\n\r\
+      5555                       5555\n\r\
+     5555       5555555555555555555555\n\r\
+    5555       555555555555555555555555\n\r\
+   5555                             5555\n\r\
+  5555                               5555\n\r\
+ 5555                                 5555\n\r\
+5555555555555555555555555555          55555\n\r\
+ 55555           555555555           55555\n\r\
+   55555           55555           55555\n\r\
+     55555           5           55555\n\r\
+       55555                   55555\n\r\
+         55555               55555\n\r\
+           55555           55555\n\r\
+             55555       55555\n\r\
+               55555   55555\n\r\
+                 555555555\n\r\
+                   55555\n\r\
+                     5\n\r\
+\n\r\
+";
+
+#if __riscv_xlen == 32
+  static const char welcome_msg[] = "\n\r\
+\n\r\
+Welcome to the E31 Coreplex IP FPGA Evaluation Kit!\n\r\
+\n\r";
+#else
+static const char welcome_msg[] = "\n\r\
+\n\r\
+Welcome to the E51 Coreplex IP FPGA Evaluation Kit!\n\r\
+\n\r";
+#endif
+
+static void _putc(char c) {
+  while ((int32_t) UART0_REG(UART_REG_TXFIFO) < 0);
+  UART0_REG(UART_REG_TXFIFO) = c;
+}
+
+int _getc(char * c){
+  int32_t val = (int32_t) UART0_REG(UART_REG_RXFIFO);
+  if (val > 0) {
+    *c =  val & 0xFF;
+    return 1;
+  }
+  return 0;
+}
+
+static void _puts(const char * s) {
+  while (*s != '\0'){
+    _putc(*s++);
+  }
+}
+
+int main (void){
+
+  // 115200 Baud Rate at (65 / 2) MHz
+  UART0_REG(UART_REG_DIV) = 282;
+  UART0_REG(UART_REG_TXCTRL) = UART_TXEN;
+  UART0_REG(UART_REG_RXCTRL) = UART_RXEN;
+
+  // Wait a bit because we were changing the GPIOs
+  volatile int i=0;
+  while(i < 10000){i++;}
+
+  _puts(sifive_msg);
+
+  _puts(welcome_msg);
+  
+  uint16_t r=0x3F;
+  uint16_t g=0;
+  uint16_t b=0;
+  // Set up RGB PWM
+  
+  PWM0_REG(PWM_CFG)   = 0;
+  PWM0_REG(PWM_CFG)   = (PWM_CFG_ENALWAYS) | (PWM_CFG_ZEROCMP) | (PWM_CFG_DEGLITCH);
+  PWM0_REG(PWM_COUNT) = 0;
+  
+  // The LEDs are intentionally left somewhat dim. 
+  PWM0_REG(PWM_CMP0)  = 0xFE;
+
+  while(1){
+    volatile uint64_t *  now = (volatile uint64_t*)(CLINT_CTRL_ADDR + CLINT_MTIME);
+    volatile uint64_t then = *now + 400;
+    while (*now < then) { }
+
+    if(r > 0 && b == 0){
+      r--;
+      g++;
+    }
+    if(g > 0 && r == 0){
+      g--;
+      b++;
+    }
+    if(b > 0 && g == 0){
+      r++;
+      b--;
+    }
+    
+    PWM0_REG(PWM_CMP1)  = 0xFF - (r >> 2);
+    PWM0_REG(PWM_CMP2)  = 0xFF - (g >> 2);
+    PWM0_REG(PWM_CMP3)  = 0xFF - (b >> 2);
+    
+  }// While (1)
+}
+  
-- 
cgit v1.2.3