CQpub0 Mikami
Library for LCD ACM1602NI connected using I2C interface on Nucleo F401/411. Nucleo F401/411RE で使える I2C 接続の LCD ACM1602NI 用のライブラリ．
Dependents: ACM1602NI_NucleoF4_Demo ACM1602NI_NucleoF4_Demo
Revision 0:ea06bd02d438, committed 2014-11-06
- Comitter:
- CQpub0Mikami
- Date:
- Thu Nov 06 23:48:52 2014 +0000
- Child:
- 1:0a38ce51b9b8
- Commit message:
- 1
Changed in this revision
| ACM1602NI.cpp | Show annotated file Show diff for this revision Revisions of this file |
| ACM1602NI.hpp | Show annotated file Show diff for this revision Revisions of this file |
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/ACM1602NI.cpp Thu Nov 06 23:48:52 2014 +0000
@@ -0,0 +1,117 @@
+//-------------------------------------------------------
+// Class for LCD, ACM1602Ni
+//
+// 2014/10/14, Copyright (c) 2014 MIKAMI, Naoki
+//-------------------------------------------------------
+
+#include "ACM1602NI.hpp"
+
+namespace Mikami
+{
+ // Constructor
+ Acm1602Ni::Acm1602Ni(PinName sda, PinName scl, uint32_t clock,
+ bool cursor, bool blink)
+ : i2c_(sda, scl), myI2c_((I2C_TypeDef*)NULL)
+ {
+ if ( ((sda == PB_9) || (sda == PB_7)) &&
+ ((scl == PB_8) || (scl == PB_6)) )
+ myI2c_ = (I2C_TypeDef*)I2C_1; // I2C1 will be used
+ if ( (sda == PB_3) && (scl == PB_10) )
+ myI2c_ = (I2C_TypeDef*)I2C_2; // I2C2 will be used
+ if ( ((sda == PC_9) || (sda == PB_4)) &&
+ (scl == PA_8) )
+ myI2c_ = (I2C_TypeDef*)I2C_3; // I2C3 will be used
+
+ connected_ = Clear(); // Clear display
+ if (!connected_)
+ {
+ fprintf(stderr, "\r\nLCD device not connected\r\n");
+ return;
+ }
+ if (clock != 100000) i2c_.frequency(clock);
+
+ WriteCmd(0x38); // data length：8-bit, 2-line, 5×8 dots
+ WriteCmd(0x0C | (cursor << 1) | blink);
+ WriteCmd(0x06); // cursor direction: rightward
+ }
+
+ // All clear
+ bool Acm1602Ni::Clear()
+ {
+ bool ok = WriteCmd(0x01);
+ wait_ms(50);
+ return ok;
+ }
+
+ // Write string from specified position
+ void Acm1602Ni::WriteString(const char str[])
+ {
+ for (int n=0; n<16; n++)
+ if (str[n] == 0) break;
+ else WriteChar(str[n]);
+ }
+
+ // Write string from specified position
+ void Acm1602Ni::WriteStringXY(const char str[],
+ uint8_t x, uint8_t y)
+ {
+ SetXY(x, y);
+ WriteString(str);
+ }
+
+ //---------------------------------------------------
+ // Following functions: private
+
+ // Send command and data
+ bool Acm1602Ni::LcdTx(uint8_t cmdData, uint8_t data)
+ {
+ if (!Start()) return false;
+ // defines king of "data" in next statement
+ TxDR(cmdData);
+ TxDR(data);
+ wait_us(500); // indispensable
+ // Generate stop condition
+ SetCR1(I2C_CR1_STOP);
+ return true;
+ }
+
+ // Preparation for send of command and data
+ bool Acm1602Ni::Start()
+ {
+ const uint8_t WAIT = 20;
+ const uint8_t LENGTH = 10;
+
+ // wait for I2C not busy
+ for (int n=0; n<LENGTH; n++)
+ {
+ wait_us(WAIT);
+ if (!CheckSR2(I2C_SR2_BUSY)) break;
+ if (n == LENGTH-1) return false;
+ }
+
+ // Generate start condition
+ SetCR1(I2C_CR1_START);
+ // Confirm start condition and master mode
+ for (int n=0; n<LENGTH; n++)
+ {
+ wait_us(WAIT);
+ if (CheckSR12(I2C_SR1_SB, I2C_SR2_MSL |
+ I2C_SR2_BUSY)) break;
+ if (n == LENGTH-1) return false;
+ }
+
+ // Send slave address
+ TxDR(LCD_ADDRESS_);
+ // Confirm on transmit mode
+ for (int n=0; n<LENGTH; n++)
+ {
+ wait_us(WAIT);
+ if (CheckSR12(I2C_SR1_TXE | I2C_SR1_ADDR,
+ I2C_SR2_MSL | I2C_SR2_BUSY
+ | I2C_SR2_TRA)) break;
+ if (n == LENGTH-1) return false;
+ }
+
+ return true;
+ }
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/ACM1602NI.hpp Thu Nov 06 23:48:52 2014 +0000
@@ -0,0 +1,87 @@
+//-------------------------------------------------------
+// Class for LCD, ACM1602Ni (Header)
+//
+// Default pin assignments
+// D14 SDA ---- to pin5 of LCD module
+// D15 SCL ---- to pin4 of LCD module
+//
+// Assignment of I2C ports
+// SDA SCL
+// I2C1 PB_7 or PB_9(D14) PB_6(D10) or PB_8(D15)
+// I2C2 PB_3(D3) PB_10(D6)
+// I2C3 PB_4(D5) or PC_9 PA_8(D7)
+//
+// 2014/10/14, Copyright (c) 2014 MIKAMI, Naoki
+//-------------------------------------------------------
+// I2C_TypeDef: See stm32f401xe.h on following URL
+// http://mbed.org/users/mbed_official/code/mbed/file/
+// 552587b429a1/TARGET_NUCLEO_F401RE
+//-------------------------------------------------------
+
+#ifndef ACM1602NI_HPP
+#define ACM1602NI_HPP
+
+#include "mbed.h"
+
+namespace Mikami
+{
+ class Acm1602Ni
+ {
+ public:
+ // Constructor
+ Acm1602Ni(PinName sda = D14, // SDA
+ PinName scl = D15, // SCL
+ uint32_t clock = 100000, // clock: 100 kHz
+ bool cursor = false, // cursor: off
+ bool blink = false); // blink: off
+ // Return false if LCD is not connected
+ bool GetOk() { return connected_; }
+ // All clear
+ bool Clear();
+ // Send command
+ bool WriteCmd(uint8_t cmd) { return LcdTx(0x00, cmd); }
+ // Write character
+ void WriteChar(char data) { LcdTx(0x80, data); }
+ // Specify display position, x: 0 - 15, y: 0, 1
+ void SetXY(uint8_t x = 0, uint8_t y = 0)
+ { WriteCmd(x + y*0x40 | 0x80);}
+ // Write string
+ void WriteString(const char str[]);
+ // Write string from specified position
+ void WriteStringXY(const char str[], uint8_t x, uint8_t);
+ // Clear of specified line
+ void ClearLine(uint8_t line)
+ { WriteStringXY(" ", 0, line); }
+
+ private:
+ // Slave address of ACM1602NI (0x50)
+ // left-justified 7-bit address
+ static const uint8_t LCD_ADDRESS_ = 0x50 << 1;
+
+ I2C i2c_; // Object of I2C
+ I2C_TypeDef* myI2c_; // Pointer of I2C
+
+ bool connected_; // false: LCD is not connected
+
+ bool LcdTx(uint8_t cmdData, uint8_t data);
+ bool Start();
+
+ // Forbid to use copy constructor
+ Acm1602Ni(const Acm1602Ni&);
+ // Forbid to use substitution operator
+ Acm1602Ni& operator=(const Acm1602Ni&);
+
+ // For check contents of SR2
+ bool CheckSR2(uint16_t value)
+ { return value == (myI2c_->SR2 & value); }
+
+ // For check contents of SR1 and SR2
+ bool CheckSR12(uint16_t v1, uint16_t v2)
+ { return (v1 == (myI2c_->SR1 & v1)) &&
+ (v2 == (myI2c_->SR2 & v2)); }
+
+ void TxDR(uint8_t data) { myI2c_->DR = data; }
+ void SetCR1(uint16_t data) { myI2c_->CR1 |= data; }
+ };
+}
+#endif // ACM1602NI_HPP