Diff: tim4_slaveSelect.hpp

Revision:

0:46d099dfd9d6

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tim4_slaveSelect.hpp	Sat Mar 14 06:49:49 2015 +0000
@@ -0,0 +1,62 @@
+//------------------------------------------------------
+//  Class for generate SPI slave select using TIM4
+//
+//  Default pin assignments: PB_6 (D10)
+//  PB_7, PB_8 (D15), and PB_9 (D14) also can be used
+//  2014/12/21, Copyright (c) 2014 MIKAMI, Naoki
+//------------------------------------------------------
+
+#ifndef TIM4_SLAVESELECT_HPP
+#define TIM4_SLAVESELECT_HPP
+
+#include "mbed.h"
+
+namespace Mikami
+{
+    class Tim4_ss
+    {
+    public:
+        Tim4_ss(uint16_t psc,       // prescaler
+                uint16_t arr = 18,  // auto-reload register
+                PinName pin = PB_6) // pin name
+                : myTim_(TIM4)
+        {
+            PwmOut css(pin);
+            myTim_->CR1 |= TIM_CR1_OPM; // one-pulse mode
+            myTim_->PSC = psc;          // prescaler
+            myTim_->ARR = arr;          // pulse width
+            if (pin == PB_6) myTim_->CCR1 = 1;
+            if (pin == PB_7) myTim_->CCR2 = 1;
+            if (pin == PB_8) myTim_->CCR3 = 1;
+            if (pin == PB_9) myTim_->CCR4 = 1;
+            if ( (pin != PB_6) && (pin != PB_7)
+               &&(pin != PB_8) && (pin != PB_9) )
+            {
+                fprintf(stderr, "\r\nIllegal pin name in Tim4_ss class\r\n");
+                while (true) {}
+            }
+        }
+        // Generate slave select
+        void SlaveSelect()
+        {
+            myTim_->CNT = 0;            // Set counter 0
+            myTim_->CR1 |= TIM_CR1_CEN; // Enable TIM4
+            __NOP();
+            __NOP();
+            __NOP();
+            __NOP();
+#ifdef __STM32F411xE_H
+            __NOP();
+            __NOP();
+#endif  // __STM32F411xE_H
+        }
+    private:
+        TIM_TypeDef* myTim_;
+
+        // Forbid to use copy constructor
+        Tim4_ss(const Tim4_ss&);
+        // Forbid to use substitution operator
+        Tim4_ss operator=(const Tim4_ss&);
+    };
+}
+#endif  // TIM4_SLAVESELECT_HPP