Maxim Integrated / Mbed OS Host_Software_MAX32664GWEB_HR_wrist

Example Host software for integration of MAX3266x chips (, MAX32664GWEB) equipped with Heart Rate from Wrist Algorithm. This is “stand-alone” software that runs on the MAX32630 low-power microcontroller to display heart rate on the display of the MAXREFDES101 reference design. It is intended provide a simple example of how to initialize and communicate with the sensor hub. Windows and Android communications are not supported.

Dependencies:   Maxim_Sensor_Hub_Communications BMI160 whrmDemoUI max32630hsp3

Fork of Host_Software_MAX32664GWEB_HR_wrist by mehmet gok

demoUI/screen/BufferedDisplay.cpp@13:3d1a6b947396, 2019-01-10 (annotated)

Committer:
gmehmet
Date:
Thu Jan 10 11:06:01 2019 +0300
Revision:
13:3d1a6b947396
Parent:
0:ddc2fef69ef9 
Code for evaluating Max3266x Heart Rate from Wrist Agorithm

Who changed what in which revision?

UserRevisionLine numberNew contents of line
gmehmet 0:ddc2fef69ef9 1 /***************************************************************************//**
gmehmet 0:ddc2fef69ef9 2 * @file BufferedDisplay.cpp
gmehmet 0:ddc2fef69ef9 3 * @brief Buffered version of GraphicsDisplay
gmehmet 0:ddc2fef69ef9 4 *******************************************************************************
gmehmet 0:ddc2fef69ef9 5 * @section License
gmehmet 0:ddc2fef69ef9 6 * <b>(C) Copyright 2015 Silicon Labs, http://www.silabs.com</b>
gmehmet 0:ddc2fef69ef9 7 *******************************************************************************
gmehmet 0:ddc2fef69ef9 8 *
gmehmet 0:ddc2fef69ef9 9 * Permission is granted to anyone to use this software for any purpose,
gmehmet 0:ddc2fef69ef9 10 * including commercial applications, and to alter it and redistribute it
gmehmet 0:ddc2fef69ef9 11 * freely, subject to the following restrictions:
gmehmet 0:ddc2fef69ef9 12 *
gmehmet 0:ddc2fef69ef9 13 * 1. The origin of this software must not be misrepresented; you must not
gmehmet 0:ddc2fef69ef9 14 * claim that you wrote the original software.
gmehmet 0:ddc2fef69ef9 15 * 2. Altered source versions must be plainly marked as such, and must not be
gmehmet 0:ddc2fef69ef9 16 * misrepresented as being the original software.
gmehmet 0:ddc2fef69ef9 17 * 3. This notice may not be removed or altered from any source distribution.
gmehmet 0:ddc2fef69ef9 18 *
gmehmet 0:ddc2fef69ef9 19 * DISCLAIMER OF WARRANTY/LIMITATION OF REMEDIES: Silicon Labs has no
gmehmet 0:ddc2fef69ef9 20 * obligation to support this Software. Silicon Labs is providing the
gmehmet 0:ddc2fef69ef9 21 * Software "AS IS", with no express or implied warranties of any kind,
gmehmet 0:ddc2fef69ef9 22 * including, but not limited to, any implied warranties of merchantability
gmehmet 0:ddc2fef69ef9 23 * or fitness for any particular purpose or warranties against infringement
gmehmet 0:ddc2fef69ef9 24 * of any proprietary rights of a third party.
gmehmet 0:ddc2fef69ef9 25 *
gmehmet 0:ddc2fef69ef9 26 * Silicon Labs will not be liable for any consequential, incidental, or
gmehmet 0:ddc2fef69ef9 27 * special damages, or any other relief, or for any claim by any third party,
gmehmet 0:ddc2fef69ef9 28 * arising from your use of this Software.
gmehmet 0:ddc2fef69ef9 29 *
gmehmet 0:ddc2fef69ef9 30 ******************************************************************************/
gmehmet 0:ddc2fef69ef9 31
gmehmet 0:ddc2fef69ef9 32 #include "../screen/BufferedDisplay.h"
gmehmet 0:ddc2fef69ef9 33
gmehmet 0:ddc2fef69ef9 34 #define SWAP8(a) ((((a) & 0x80) >> 7) | (((a) & 0x40) >> 5) | (((a) & 0x20) >> 3) | (((a) & 0x10) >> 1) | (((a) & 0x08) << 1) | (((a) & 0x04) << 3) | (((a) & 0x02) << 5) | (((a) & 0x01) << 7))
gmehmet 0:ddc2fef69ef9 35
gmehmet 0:ddc2fef69ef9 36 namespace silabs {
gmehmet 0:ddc2fef69ef9 37
gmehmet 0:ddc2fef69ef9 38 BufferedDisplay::BufferedDisplay(const char *name) : GraphicsDisplay(name) {
gmehmet 0:ddc2fef69ef9 39 memset((uint8_t*)_pixelBuffer, White, sizeof(_pixelBuffer)); // init full frame buffer
gmehmet 0:ddc2fef69ef9 40 memset((uint8_t*)_dirtyRows, 0xFF, sizeof(_dirtyRows)); // init dirty status
gmehmet 0:ddc2fef69ef9 41 }
gmehmet 0:ddc2fef69ef9 42
gmehmet 0:ddc2fef69ef9 43 /**
gmehmet 0:ddc2fef69ef9 44 * Override of GraphicsDisplay's pixel()
gmehmet 0:ddc2fef69ef9 45 */
gmehmet 0:ddc2fef69ef9 46
gmehmet 0:ddc2fef69ef9 47 void BufferedDisplay::pixel(int x, int y, int colour) {
gmehmet 0:ddc2fef69ef9 48 /* Apply constraint to x and y */
gmehmet 0:ddc2fef69ef9 49 if(x < 0 || y < 0) return;
gmehmet 0:ddc2fef69ef9 50 if(x >= DISPLAY_WIDTH || y >= DISPLAY_HEIGHT) return;
gmehmet 0:ddc2fef69ef9 51
gmehmet 0:ddc2fef69ef9 52 /*****************************************************************************************************************
gmehmet 0:ddc2fef69ef9 53 * The display expects LSB input, while the SPI is configured for 8bit MSB transfers. Therefore, we should
gmehmet 0:ddc2fef69ef9 54 * construct the framebuffer accordingly, so that an MSB transmission will put pixel 0 first on the wire.
gmehmet 0:ddc2fef69ef9 55 *
gmehmet 0:ddc2fef69ef9 56 * So the actual pixel layout in framebuffer (for 128x128) is as follows:
gmehmet 0:ddc2fef69ef9 57 * { //Framebuffer
gmehmet 0:ddc2fef69ef9 58 * { //Line 0
gmehmet 0:ddc2fef69ef9 59 * {p0, p1, p2, p3, p4, p5, p6, p7}, //Line 0 byte 0 (byte 0)
gmehmet 0:ddc2fef69ef9 60 * {p8, p9,p10,p11,p12,p13,p14,p15}, //Line 0 byte 1 (byte 1)
gmehmet 0:ddc2fef69ef9 61 * ...
gmehmet 0:ddc2fef69ef9 62 * {p120,p121,p122,p123,p124,p125,p126,p127} //Line 0 byte 15 (byte 15)
gmehmet 0:ddc2fef69ef9 63 * },
gmehmet 0:ddc2fef69ef9 64 * { //Line 1
gmehmet 0:ddc2fef69ef9 65 * {p128,p129,p130,p131,p132,p133,p134,p135}, //Line 1 byte 0 (byte 16)
gmehmet 0:ddc2fef69ef9 66 * ...
gmehmet 0:ddc2fef69ef9 67 * },
gmehmet 0:ddc2fef69ef9 68 * ...
gmehmet 0:ddc2fef69ef9 69 * { //Line 127
gmehmet 0:ddc2fef69ef9 70 * {...}, //Line 127 byte 0 (byte 2032)
gmehmet 0:ddc2fef69ef9 71 * ...
gmehmet 0:ddc2fef69ef9 72 * {...} //Line 127 byte 15 (byte 2047) = 128*128 bits
gmehmet 0:ddc2fef69ef9 73 * }
gmehmet 0:ddc2fef69ef9 74 * }
gmehmet 0:ddc2fef69ef9 75 *
gmehmet 0:ddc2fef69ef9 76 * This means that to calculate the actual bit position in the framebuffer byte, we need to swap the bit
gmehmet 0:ddc2fef69ef9 77 * order of the lower three bits. So pixel 7 becomes bit offset 0, 6 -> 1, 5 -> 2, 4->3, 3->4, 2->5, 1->6 and 0->7.
gmehmet 0:ddc2fef69ef9 78 *****************************************************************************************************************/
gmehmet 0:ddc2fef69ef9 79 uint8_t swapx = 7 - ((unsigned int)x & 0x07);
gmehmet 0:ddc2fef69ef9 80 x = ((unsigned int)x & 0xFFFFFFF8) | swapx;
gmehmet 0:ddc2fef69ef9 81
gmehmet 0:ddc2fef69ef9 82 /* Since we are dealing with 1-bit pixels, we can avoid having to do bitshift and comparison operations twice.
gmehmet 0:ddc2fef69ef9 83 * Basically, do the comparison with the requested state and current state, and if it changed, do an XOR on the framebuffer pixel and set the line to dirty.
gmehmet 0:ddc2fef69ef9 84 */
gmehmet 0:ddc2fef69ef9 85 bool change = ((_pixelBuffer[((y * DISPLAY_WIDTH) + x) / DISPLAY_BUFFER_TYPE_SIZE] & (1 << (x & DISPLAY_BUFFER_TYPE_MASK))) != ((colour & 0x01) << (x & DISPLAY_BUFFER_TYPE_MASK)));
gmehmet 0:ddc2fef69ef9 86 if(change) {
gmehmet 0:ddc2fef69ef9 87 /* Pixel's value and requested value are different, so since it's binary, we can simply do an XOR */
gmehmet 0:ddc2fef69ef9 88 _pixelBuffer[((y * DISPLAY_WIDTH) + x) / DISPLAY_BUFFER_TYPE_SIZE] ^= (1 << (x & DISPLAY_BUFFER_TYPE_MASK));
gmehmet 0:ddc2fef69ef9 89
gmehmet 0:ddc2fef69ef9 90 /* notify dirty status of this line */
gmehmet 0:ddc2fef69ef9 91 _dirtyRows[y / DISPLAY_BUFFER_TYPE_SIZE] |= (1 << (y & DISPLAY_BUFFER_TYPE_MASK));
gmehmet 0:ddc2fef69ef9 92 }
gmehmet 0:ddc2fef69ef9 93 }
gmehmet 0:ddc2fef69ef9 94
gmehmet 0:ddc2fef69ef9 95 int BufferedDisplay::width() {
gmehmet 0:ddc2fef69ef9 96 return DISPLAY_WIDTH;
gmehmet 0:ddc2fef69ef9 97 }
gmehmet 0:ddc2fef69ef9 98 int BufferedDisplay::height() {
gmehmet 0:ddc2fef69ef9 99 return DISPLAY_HEIGHT;
gmehmet 0:ddc2fef69ef9 100 }
gmehmet 0:ddc2fef69ef9 101
gmehmet 0:ddc2fef69ef9 102 /**
gmehmet 0:ddc2fef69ef9 103 * Function to move bitmap into frame buffer
gmehmet 0:ddc2fef69ef9 104 * arguments:
gmehmet 0:ddc2fef69ef9 105 * * bitmap: pointer to uint8 array containing horizontal pixel data
gmehmet 0:ddc2fef69ef9 106 * * bmpWidth: width of the bitmap in pixels (must be multiple of 8)
gmehmet 0:ddc2fef69ef9 107 * * bmpHeight: height of the bitmap in pixels
gmehmet 0:ddc2fef69ef9 108 * * startX: starting position to apply bitmap in horizontal direction (0 = leftmost) (must be multiple of 8)
gmehmet 0:ddc2fef69ef9 109 * * startY: starting position to apply bitmap in vertical direction (0 = topmost)
gmehmet 0:ddc2fef69ef9 110 */
gmehmet 0:ddc2fef69ef9 111 void BufferedDisplay::showBMP(const uint8_t* bitmap, const uint32_t bmpWidth, const uint32_t bmpHeight, const uint32_t startX, const uint32_t startY) {
gmehmet 0:ddc2fef69ef9 112 uint32_t bmpLine = 0, y = startY, bytesPerLine = ((bmpWidth >= (DISPLAY_WIDTH - startX)) ? (DISPLAY_WIDTH - startX) : bmpWidth) / 8;
gmehmet 0:ddc2fef69ef9 113
gmehmet 0:ddc2fef69ef9 114 /* Apply constraints */
gmehmet 0:ddc2fef69ef9 115 if((bmpWidth & 0x07) != 0) return;
gmehmet 0:ddc2fef69ef9 116 if((startX & 0x07) != 0) return;
gmehmet 0:ddc2fef69ef9 117 if(startX >= DISPLAY_WIDTH) return;
gmehmet 0:ddc2fef69ef9 118
gmehmet 0:ddc2fef69ef9 119 //Superflouous due to for-loop check
gmehmet 0:ddc2fef69ef9 120 //if((startY >= DISPLAY_HEIGHT) return;
gmehmet 0:ddc2fef69ef9 121
gmehmet 0:ddc2fef69ef9 122 /* Copy over bytes to the framebuffer, do not write outside framebuffer boundary */
gmehmet 0:ddc2fef69ef9 123 for(; y < DISPLAY_HEIGHT; y++) {
gmehmet 0:ddc2fef69ef9 124 /* Check that we are not writing more than the BMP height */
gmehmet 0:ddc2fef69ef9 125 if(bmpLine >= bmpHeight) break;
gmehmet 0:ddc2fef69ef9 126
gmehmet 0:ddc2fef69ef9 127 /* Copy over one line (bmpLine) from the BMP file to the corresponding line (y) in the pixel buffer */
gmehmet 0:ddc2fef69ef9 128 memcpy( (void*) &(((uint8_t*)_pixelBuffer)[((y * DISPLAY_WIDTH) + startX) / 8]),
gmehmet 0:ddc2fef69ef9 129 (const void*) &(bitmap[bmpLine * (bmpWidth / 8)]),
gmehmet 0:ddc2fef69ef9 130 bytesPerLine);
gmehmet 0:ddc2fef69ef9 131
gmehmet 0:ddc2fef69ef9 132 /* Set dirty status for the line we just overwrote */
gmehmet 0:ddc2fef69ef9 133 _dirtyRows[y / DISPLAY_BUFFER_TYPE_SIZE] |= (1 << (y % DISPLAY_BUFFER_TYPE_SIZE));
gmehmet 0:ddc2fef69ef9 134 bmpLine++;
gmehmet 0:ddc2fef69ef9 135 }
gmehmet 0:ddc2fef69ef9 136
gmehmet 0:ddc2fef69ef9 137 return;
gmehmet 0:ddc2fef69ef9 138 }
gmehmet 0:ddc2fef69ef9 139 }