Antonio Mondragon / Mbed OS ATT_AWS_IoT_demo

DIYmall 0.96" Inch I2c IIC Serial 128x64 Oled LCD LED White Display Module

Dependencies:   Adafruit_GFX SDFileSystem

Fork of ATT_AWS_IoT_demo by AT&T IoT

WNCInterface/WncControllerK64F/MODSERIAL/PUTC.cpp@28:4650c541b029, 2018-10-09 (annotated)

Committer:
afmiee
Date:
Tue Oct 09 20:57:34 2018 +0000
Revision:
28:4650c541b029
Parent:
15:6f2798e45099 
DIYmall 0.96" Inch I2c IIC Serial 128x64 Oled LCD LED White Display Module

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ampembeng 15:6f2798e45099 1 /*
ampembeng 15:6f2798e45099 2 Copyright (c) 2010 Andy Kirkham
ampembeng 15:6f2798e45099 3
ampembeng 15:6f2798e45099 4 Permission is hereby granted, free of charge, to any person obtaining a copy
ampembeng 15:6f2798e45099 5 of this software and associated documentation files (the "Software"), to deal
ampembeng 15:6f2798e45099 6 in the Software without restriction, including without limitation the rights
ampembeng 15:6f2798e45099 7 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
ampembeng 15:6f2798e45099 8 copies of the Software, and to permit persons to whom the Software is
ampembeng 15:6f2798e45099 9 furnished to do so, subject to the following conditions:
ampembeng 15:6f2798e45099 10
ampembeng 15:6f2798e45099 11 The above copyright notice and this permission notice shall be included in
ampembeng 15:6f2798e45099 12 all copies or substantial portions of the Software.
ampembeng 15:6f2798e45099 13
ampembeng 15:6f2798e45099 14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
ampembeng 15:6f2798e45099 15 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
ampembeng 15:6f2798e45099 16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
ampembeng 15:6f2798e45099 17 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
ampembeng 15:6f2798e45099 18 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
ampembeng 15:6f2798e45099 19 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
ampembeng 15:6f2798e45099 20 THE SOFTWARE.
ampembeng 15:6f2798e45099 21 */
ampembeng 15:6f2798e45099 22
ampembeng 15:6f2798e45099 23 #include "MODSERIAL.h"
ampembeng 15:6f2798e45099 24 #include "MACROS.h"
ampembeng 15:6f2798e45099 25
ampembeng 15:6f2798e45099 26 namespace AjK {
ampembeng 15:6f2798e45099 27
ampembeng 15:6f2798e45099 28 int
ampembeng 15:6f2798e45099 29 MODSERIAL::__putc(int c, bool block) {
ampembeng 15:6f2798e45099 30
ampembeng 15:6f2798e45099 31 // If no buffer is in use fall back to standard TX FIFO usage.
ampembeng 15:6f2798e45099 32 // Note, we must block in this case and ignore bool "block"
ampembeng 15:6f2798e45099 33 // so as to maintain compat with Mbed Serial.
ampembeng 15:6f2798e45099 34 if (buffer[TxIrq] == (char *)NULL || buffer_size[TxIrq] == 0) {
ampembeng 15:6f2798e45099 35 while (! MODSERIAL_WRITABLE) ; // Wait for space in the TX FIFO.
ampembeng 15:6f2798e45099 36 MODSERIAL_WRITE_REG = (uint32_t)c;
ampembeng 15:6f2798e45099 37 return 0;
ampembeng 15:6f2798e45099 38 }
ampembeng 15:6f2798e45099 39
ampembeng 15:6f2798e45099 40 if ( MODSERIAL_WRITABLE && MODSERIAL_TX_BUFFER_EMPTY ) {
ampembeng 15:6f2798e45099 41 MODSERIAL_WRITE_REG = (uint32_t)c;
ampembeng 15:6f2798e45099 42 }
ampembeng 15:6f2798e45099 43 else {
ampembeng 15:6f2798e45099 44 if (block) {
ampembeng 15:6f2798e45099 45 uint32_t irq_reg = MODSERIAL_IRQ_REG; DISABLE_TX_IRQ;
ampembeng 15:6f2798e45099 46 while ( MODSERIAL_TX_BUFFER_FULL ) { // Blocks!
ampembeng 15:6f2798e45099 47 // If putc() is called from an ISR then we are stuffed
ampembeng 15:6f2798e45099 48 // because in an ISR no bytes from the TX buffer will
ampembeng 15:6f2798e45099 49 // get transferred to teh TX FIFOs while we block here.
ampembeng 15:6f2798e45099 50 // So, to work around this, instead of sitting in a
ampembeng 15:6f2798e45099 51 // loop waiting for space in the TX buffer (which will
ampembeng 15:6f2798e45099 52 // never happen in IRQ context), check to see if the
ampembeng 15:6f2798e45099 53 // TX FIFO has space available to move bytes from the
ampembeng 15:6f2798e45099 54 // TX buffer to TX FIFO to make space. The easiest way
ampembeng 15:6f2798e45099 55 // to do this is to poll the isr_tx() function while we
ampembeng 15:6f2798e45099 56 // are blocking.
ampembeng 15:6f2798e45099 57 isr_tx(false);
ampembeng 15:6f2798e45099 58 }
ampembeng 15:6f2798e45099 59 MODSERIAL_IRQ_REG = irq_reg;
ampembeng 15:6f2798e45099 60 }
ampembeng 15:6f2798e45099 61 else if( MODSERIAL_TX_BUFFER_FULL ) {
ampembeng 15:6f2798e45099 62 buffer_overflow[TxIrq] = c; // Oh dear, no room in buffer.
ampembeng 15:6f2798e45099 63 _isr[TxOvIrq].call(&this->callbackInfo);
ampembeng 15:6f2798e45099 64 return -1;
ampembeng 15:6f2798e45099 65 }
ampembeng 15:6f2798e45099 66 DISABLE_TX_IRQ;
ampembeng 15:6f2798e45099 67 buffer[TxIrq][buffer_in[TxIrq]] = c;
ampembeng 15:6f2798e45099 68 __disable_irq();
ampembeng 15:6f2798e45099 69 buffer_count[TxIrq]++;
ampembeng 15:6f2798e45099 70 __enable_irq();
ampembeng 15:6f2798e45099 71 buffer_in[TxIrq]++;
ampembeng 15:6f2798e45099 72 if (buffer_in[TxIrq] >= buffer_size[TxIrq]) {
ampembeng 15:6f2798e45099 73 buffer_in[TxIrq] = 0;
ampembeng 15:6f2798e45099 74 }
ampembeng 15:6f2798e45099 75 ENABLE_TX_IRQ;
ampembeng 15:6f2798e45099 76 }
ampembeng 15:6f2798e45099 77
ampembeng 15:6f2798e45099 78 return 0;
ampembeng 15:6f2798e45099 79 }
ampembeng 15:6f2798e45099 80
ampembeng 15:6f2798e45099 81 }; // namespace AjK ends
ampembeng 15:6f2798e45099 82