I am using the STSW-IMG501 software v1.1.1 with the STEVAL-EVK-U0I connected to a STEVAL-56G3MAI (the S-board evaluation module for the VD56G3). In the EVK software, I am using the built-in script generation tool to upload different register configuration sets and test them. However, I find that uploading the following script will cause the SW to fail to read a frame sequence:
$SCRIPT
SetBank(0x20);
WriteAutoIncrement(0x0220, 0x00, 0x1b, 0xb7, 0x00); //SENSOR_SETTINGS.EXT_CLOCK = 12000000
WriteAutoIncrement(0x0224, 0x02); //SENSOR_SETTINGS.CLK_PLL_PREDIV = 2
WriteAutoIncrement(0x0226, 0x86); //SENSOR_SETTINGS.CLK_SYS_PLL_MULT = 134
WriteAutoIncrement(0x0227, 0x05); //SENSOR_SETTINGS.VT_CLK_DIV = 5
WriteAutoIncrement(0x0300, 0xd4, 0x04); //STREAM_STATICS.LINE_LENGTH = 1236
WriteAutoIncrement(0x0304, 0x00, 0x00); //STREAM_STATICS.X_START = 0
WriteAutoIncrement(0x0306, 0x63, 0x04); //STREAM_STATICS.X_END = 1124
WriteAutoIncrement(0x030a, 0x08); //STREAM_STATICS.FORMAT_CTRL = RAW8
WriteAutoIncrement(0x0312, 0xF0, 0x03); //STREAM_STATICS.OIF_CSI_BITRATE = 1008
WriteAutoIncrement(0x0458, 0xf0, 0x10); //STREAM_CTX0.FRAME_LENGTH = 4336->30fps
WriteAutoIncrement(0x044c, 0x00); //STREAM_CTX0.EXPOSURE_MODE = 0
//1120x480
WriteAutoIncrement(0x045a, 0xba, 0x01); //STREAM_CTX0.Y_START = 442
WriteAutoIncrement(0x045c, 0x99, 0x03); //STREAM_CTX0.Y_END = 921
WriteAutoIncrement(0x045e, 0x02, 0x00); //STREAM_CTX0.OUT_ROI_X_START = 2
WriteAutoIncrement(0x0460, 0x61, 0x04); //STREAM_CTX0.OUT_ROI_X_END = 1121
WriteAutoIncrement(0x0462, 0x00, 0x00); //STREAM_CTX0.OUT_ROI_Y_START = 0
WriteAutoIncrement(0x0464, 0xdf, 0x01); //STREAM_CTX0.OUT_ROI_Y_END = 479
If the ROI parameters are changed from 1120x480 to the full resolution (1120x1360), it works fine.
//1120x1360
WriteAutoIncrement(0x045a, 0x00, 0x00); //STREAM_CTX0.Y_START
WriteAutoIncrement(0x045c, 0x53, 0x05); //STREAM_CTX0.Y_END
WriteAutoIncrement(0x045e, 0x02, 0x00); //STREAM_CTX0.OUT_ROI_X_START
WriteAutoIncrement(0x0460, 0x61, 0x04); //STREAM_CTX0.OUT_ROI_X_END
WriteAutoIncrement(0x0462, 0x02, 0x00); //STREAM_CTX0.OUT_ROI_Y_START
WriteAutoIncrement(0x0464, 0x51, 0x05); //STREAM_CTX0.OUT_ROI_Y_END
The SW only fails at 1120x480 if it is the first script uploaded after powering on the sensor and booting up the SW. If I instead start at 1120x1360, run that for a little bit, then switch over to 1120x480, it works great. Because of this, I don't think there is anything wrong with using that specific resolution when selecting a ROI, just when starting with that resolution after powering on.
Is there a reason that this happens? I am using the evaluation platform to verify different register configurations before uploading them to a custom built sensor PCB, but am concerned that there is something wrong with starting at specific resolutions when using the sensor. Is this a bug in the SW, or will the image sensor itself also fail to stream data when configured at different resolutions after power-up?
